BullseyeBore Core - Safety Guidelines

General safety Guidelines for all BullseyeBore Core Products

Please read and follow these general safety guidelines for safe use of BullseyeBore Core and/or BullseyeBore Core Accessories (collectively defined as “BullseyeBore Core Products” or "BullseyeBore Products" or "Products") as well as the specific guidance below for use of BullseyeBore Core directly on the drill chuck or with an accessories such as an optional BullseyeBore Core Standard Chuck Guide or an optional BullseyeBore Core Chuck Extension.


Limitation of liability.

Notice is hereby given that any use of BullseyeBore Core Products indemnifies BullseyeBore Inc against any bodily or property damage caused, directly or indirectly, by BullseyeBore Core Products or their usage.

Extreme caution is advised.

Please exercise extreme caution when using or attempting to use BullseyeBore Core Products. Extreme caution is necessary to prevent personal injuries, property damages and product damages. Although the BullseyeBore Core Products are designed with safety in mind, power tools such as power drills are dangerous, and accidents can occur if they are not used properly and safely.

Please read your power drill’s safety guidance.

Power drills are dangerous, and accidents can occur if they are not used properly and safely. Please read your power drill’s operations manual and safety guidance before using your drill with or without BullseyeBore Core Products.

Always wear protective gear.

Protective gear including an ANSI Z87.1 face shield and/or ANSI Z87.1 protective glasses are required as is the use of protective clothing and protective gloves while using BullseyeBore Core Products.

Child Safety Warning.

Children under 18 should not handle or use BullseyeBore Core Products. Power tools such as power drills are dangerous, and accidents can occur if they are not used properly and safely. Further, the magnets in BullseyeBore Core Products are powerful and can cause damage or bodily harm.

Always exercise extreme caution when drilling or using BullseyeBore Core Products.

Although the BullseyeBore Core Products are designed with safety in mind, impact of the BullseyeBore Core Products with fingers, hands, or body parts during drill rotation should be avoided. Always remember that BullseyeBore Core Products are mounted on a drill chuck and rotate at the same rotational speed as the drill chuck.

Do not initiate drill rotation with BullseyeBore Products unless a drill bit is also securely mounted in the drill chuck.

For purposes of safety, do not initiate drill rotation with BullseyeBore Core unless a drill bit of at least 2" in length is also securely mounted into the chuck. If an optional BullseyeBore Core Chuck Extension is utilized in combination with BullseyeBore Core, do not initiate drill rotation with BullseyeBore Core and the BullseyeBore Core Chuck Extension unless a drill bit of at least 3" in length is also securely mounted into the chuck. A securely mounted drill bit can help to prevent a complete separation of BullseyeBore Core Products from the drill chuck if a disconnection occurs.

Do not use BullseyeBore Core Products on drills that exceed 2500 RPM.

Do not use BullseyeBore Core Products on drills with a maximum rotational speed of greater than 2500 RPM. Use of BullseyeBore Core Products on a drill with a maximum rotational speed of greater than 2500 RPM may lead to disconnection of BullseyeBore Core Products from the drill chuck during use.

Do not use BullseyeBore Core Products with Rotary Impact Hammer Drills.

Do NOT attempt to use BullseyeBore Core Products with a Rotary Impact Hammer Drill. BullseyeBore Core products are incompatible with Rotary Impact Hammer Drills.

Do not use BullseyeBore Core Products if they are damaged in any way.

Always check BullseyeBore Core Products for damage before and after drilling operations. Do not use BullseyeBore Core Products if they are damaged in any way. This can include but is not limited to product damages such as cracks, fractures, breaks, or even chips in any part of the BullseyeBore Core Products.

Verify that the BullseyeBore Core optical window is free of defects, damage, and debris.

Always check the BullseyeBore Core optical window for defects, damage, and debris before and after drilling operations. Do not use BullseyeBore Core if the optical window contains defects or damage. Any window debris, unrelated to defects or damage, can be safely removed with compressed air or a microfiber cloth.

Verify that the BullseyeBore Core housing and body are securely screwed together before use.

Always check to make sure the BullseyeBore Core housing and body are securely screwed together both before and after drilling operations.

Keep your fingers, hands, and body off the drill trigger until you are ready to drill safely.

Keep your fingers, hands, and body off and away from the drill trigger until you are ready to drill safely.This is especially important while mounting or dismounting BullseyeBore Core Products onto or off the drill chuck or when installing, connecting, or disconnecting BullseyeBore Core Products.

Keep your fingers, hands, and body clear of the Bullseyebore Core Product’s rotational plane.

Keep your fingers, hands, and body safely away from the drill bit and out of the rotational plane or path of BullseyeBore Core Products before, during, and after drilling operations. Please also avoid the use of BullseyeBore Core Products with persons in or around the rotational plane or path of the product.

Observe and avoid potential obstructions before and during drilling operations.

The BullseyeBore Core Products should not be used in any locations that may cause or create an impact with the BullseyeBore Core Products during drill rotation or in any locations that contain items that may entangle or disrupt BullseyeBore Core Products during drill rotation. Examples to avoid include but are not limited to drilling operations in and around confined spaces where an impact may occur, or in locations that contain items that entangle or disrupt BullseyeBore Core Products during drill rotation such as loose wires.


Please be sure to look for any potential obstructions both before and during drilling operations with BullseyeBore Core Products. If an obstruction is encountered during a drill operation, immediately cease the drilling operation, safely clear the obstruction, and examine the BullseyeBore Core Products, the drill bit, and the drill for damage. Do not use the BullseyeBore Core Products if they are damaged in any way.

Avoid the use of BullseyeBore Core Products with persons in or around the rotational plane of the Products.

Please avoid the use of BullseyeBore Core Products if a person or persons are in or around the rotational plane or path of the BullseyeBore Core Products prior to, during, or after operations.

Always store BullseyeBore Core securely.

BullseyeBore Core should be stored securely with the intent of avoiding any potential damage or magnetic interaction with other items. A good practice is to store BullseyeBore Core in a secure dedicated case, or on a safe flat ferrous(metallic) surface where BullseyeBore Core is both secure in place on the ferrous surface and far away from any loose tools or other items.

Always store BullseyeBore Core Accessories securely.

BullseyeBore Core Accessories should be stored securely with the intent of avoiding any potential damage. A good practice is to store BullseyeBore Core Accessories in a secure dedicated case. Magnetic BullseyeBore Core Accessories such as Chuck Extensions should be stored in a secure dedicated case or on a safe flat ferrous (metallic) surface where Chuck Extensions are both secure in place on the ferrous surface and far away from any loose tools or other items.

Avoid dropping or mishandling BullseyeBore Core Products.

Do not drop or mishandle BullseyeBore Core Products. Any impact to BullseyeBore Core Products can damage the product(s) or property. Always check BullseyeBore Core Products for damage if they are dropped or mishandled. Always check BullseyeBore Core Products for damage before and after drilling operations. Do not use BullseyeBore Core Products if they are damaged in any way.

Use only genuine BullseyeBore Core Products.

BullseyeBore Core Products should not be used with any 3rd party accessories or non-BullseyeBore products. Use of any 3rd party accessories or non-BullseyeBore products with BullseyeBore Core Products may cause personal injuries, property damages or product damages, and must be avoided.

Strong magnet warning.

BullseyeBore Core and the BullseyeBore Core Chuck Extensions all contain one or more strong neodymium magnets. The strong magnetic fields of neodymium magnets can damage items such as cellular phones, televisions, computer monitors, credit cards, bank cards, computers, diskettes and other data carriers, video tapes, mechanical watches, hearing aids, loudspeakers, and VCRs. Please keep any magnetic sensitive equipment or material at a minimum of 3 feet distance from BullseyeBore Core and BullseyeBore Chuck Extensions (or farther if specified by the equipment manufacturer).


  • Pacemakers may be damaged or switch to "Test Mode" in the presence of a strong magnetic force.If a pacemaker or other electrical body implant is in use, keep a minimum of 3 feet distance from BullseyeBore Core and BullseyeBore Chuck Extensions (or farther if specified by the implant manufacturer).
  • Neodymium magnets can cause serious damage to fingers if caught between two magnets such as breaking bones or losing fingertips. Serious damage to fingers can also occur if caught between a magnet and a metallic surface such as a chuck or drill bit or between BullseyeBore Core or BullseyeBore Chuck Extensions. Please be extremely cautious of the BullseyeBore Core Product’s neodymium magnetic forces during handling, usage and or storage.

always Rotationally test bullseyebore core prior to use in a safe enclosed container.

Always test the fit and connection of BullseyeBore Core on your drill’s chuck face prior to any operations. Some drill chucks may not operate with BullseyeBore Core due to their size or shape. Before using BullseyeBore Core in a drilling operation for the first time, it is recommended that you perform rotational testing within a safe and small enclosed area (such as a large thick cardboard box with one side open) that eliminates any danger or damage in the event of a disconnection between BullseyeBore Core and the drill chuck. The rotational test should be accomplished at the maximum RPM of the drill, which should be no greater than 2500 RPM, and must follow all the required safety guidelines in this document (such as use of protective clothing, protective gloves, ANSI Z87.1 protective eyewear, and a minimum of a 3" long drill bit mounted firmly in the chuck). The rotational test is designed to be performed without any drilling operation and solely for the purpose of validating that a firm and unmoving connection exists between BullseyeBore Core and the drill chuck face at maximum drill RPM.


If BullseyeBore Core is displaced on the chuck face or detaches during rotational testing, immediately cease use of BullseyeBore Core with that drill chuck and drill.


Further, if you intend to use a BullseyeBore Core Chuck Extension, please follow the Safety Guidelines below for the use of BullseyeBore Core with an Optional Chuck Extension.

Safety Guidelines for use of BullseyeBore Core with an optional BullseyeBore Core Chuck Extension


Follow the applicable bullseyebore Core safety guidance above in combination with this specific guidance for use with optional bullseyebore Core chuck extensions (also known as "BullseyeBore chuck extensions" or "chuck extensions").

ONLY USE A SINGLE BULLSEYEBORE Core CHUCK EXTENSION.

A single BullseyeBore Chuck Extension may be optionally used to extend forward the mounting position of BullseyeBore Core on the rotational axis of the drill. Chuck Extensions move BullseyeBore Core forward on the rotational axis of the drill and thus can be used to reduce the overall diameter of the BullseyeBore Core worksurface patterns with longer drill bits.


Only a single BullseyeBore Chuck Extension may be used on a drill chuck at any one time, and BullseyeBore Core Chuck Extensions should NEVER be stacked on a drill chuck. Stacked BullseyeBore Chuck Extensions can lead to potentially unstable and/or unsafe rotation on the drill chuck. Further, stacked BullseyeBore Chuck Extensions may also contribute to inaccurately projected alignment patterns on the worksurface. 

DO NOT INITIATE DRILL ROTATION WITH BULLSEYEBORE PRODUCTS UNLESS A DRILL BIT IS ALSO SECURELY MOUNTED IN THE DRILL CHUCK.

For purposes of safety, do not initiate drill rotation with BullseyeBore Core and a BullseyeBore Core Chuck Extension unless a drill bit of at least 3" in length is also securely mounted into the chuck. A securely mounted drill bit can help to prevent a complete separation of BullseyeBore Core Products from the drill chuck if a disconnection occurs.

Use caution when mounting or dismounting the BullseyeBore Core Chuck Extension onto or off a drill chuck.

Please exercise extreme caution when mounting or dismounting a BullseyeBore Core Extension onto or off a drill chuck, and make sure to keep your fingers clear of the space between the chuck and BullseyeBore Core Chuck Extension. The BullseyeBore Core Chuck Extension magnetic connection is strong and can compress or damage any item caught between it and the chuck. Please also make sure to keep your fingers clear of the drill bit if the BullseyeBore Core Chuck Extension is mounted onto the chuck or dismounted from the chuck with a drill bit already in place in the chuck.

Use caution when mounting or dismounting BullseyeBore Core onto or off the BullseyeBore  Core Chuck Extension.

BullseyeBore Core connects directly to the BullseyeBore Core Chuck Extension. Please exercise extreme caution when mounting BullseyeBore Core onto or off the BullseyeBore Core Chuck Extension, and make sure to keep your fingers clear of the space between BullseyeBore Core and the BullseyeBore Core Chuck Extension. Both BullseyeBore Core and the BullseyeBore Core Chuck Extension contain a strong magnetic connection and can compress or damage any item caught between them. Please also make sure to keep your fingers clear of the drill bit if BullseyeBore Core is mounted or dismounted onto or off the BullseyeBore Core Chuck Extension with a drill bit already in place in the chuck.

Do not initiate drill rotation unless the BullseyeBore Core Chuck Extension is securely mounted to a drill chuck.

For purposes of safety, do not initiate drill rotation unless the BullseyeBore Core Chuck Extension is fully secured to the chuck face with a strong magnetic connection.

Do not initiate drill rotation unless BullseyeBore Core is securely mounted to the BullseyeBore Core Chuck Extension.

When optionally used with a BullseyeBore Core Chuck Extension, BullseyeBore Core connects directly to the front of the BullseyeBore Core Chuck Extension, and the alignment ring on the BullseyeBore Core Chuck Extension fits into the circular conduit on the back of BullseyeBore Core. For purposes of safety, do not initiate drill rotation unless the BullseyeBore Core Chuck Extension alignment guide is fully seated into BullseyeBore Core, and both are fully secured together with a strong magnetic connection.

Always Rotationally test BullseyeBore Core Chuck Extensions and BullseyeBore Core Prior to Use in a safe enclosed container.

Always test the fit and connection of the BullseyeBore Core Chuck Extension on your drill’s chuck face prior to any operations. Some drill chucks may not operate with Chuck Extensions due to their small size or shape. Before using BullseyeBore Core with a BullseyeBore Core Chuck Extension on a drill for the first time, it is recommended that you perform rotational testing within a safe and small enclosed area (such as a large thick cardboard box with one side open) that eliminates any danger or damage in the event of a disconnection between BullseyeBore Core, the BullseyeBore Core Chuck Extension, and the drill chuck. The rotational test should be accomplished at the maximum RPM of the drill, which should be no greater than 2500 RPM, and must follow all the required safety guidelines in this document (such as use of protective clothing, protective gloves, ANSI Z87.1 protective eyewear, and a minimum of a 3" long drill bit mounted firmly in the chuck). The rotational test is designed to be performed without any drilling operation and solely for the purpose of validating that a firm and unmoving connection exists between BullseyeBore Core, a BullseyeBore Core Chuck Extension, and the drill chuck face at maximum drill RPM.


If BullseyeBore Core and/or the BullseyeBore Core Chuck Extension is displaced on the chuck or detaches during rotational testing, immediately cease use of BullseyeBore Core and the BullseyeBore Core Chuck Extension with that drill chuck and drill.

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