Will my hex shank drill chuck work with BullseyeBore Core?

Please note that there are tens of thousands of power drills and drill chucks in use worldwide today, and the BullseyeBore team cannot possibly test all of them. This includes the hex shank drill chucks that are typically common on impact drivers. Therefore, we have provided some general guidelines below.


The BullseyeBore Core product is designed to work with a wide variety of common 0.25” (1/4”) hex shank chucks. There are generally two criteria that you can use to assess if the Core product will work with your hex shank chuck.

1: THE HEX SHANK DRILL CHUCK MUST HAVE A METALLIC FLAT FACE THAT IS 0.44” OR LARGER.

Your hex shank drill chuck must have a metallic flat face. The “face” of the chuck is the forward-most portion that the bit goes into. The face is typically round with a hex shaped hole in the center that locks the hex bit in place. BullseyeBore Core connects directly to the face of the hex chuck through a unique patent pending magnetic connection. The face must contain a large enough flat metallic surface to magnetically connect to BullseyeBore Core. As a general guide, the outer diameter of the metallic flat hex chuck face must be 0.4” or larger.

2: THE HEX SHANK DRILL CHUCK BIT HOLE MUST BE THE STANDARD 0.25” (1/4”) HEX HOLE.

Standard hex shank drill chuck bit holes are typically slightly larger than0.25” (1/4”). Do not use BullseyeBore Core with non-standard hex shank chucks.Here is an image of standard hex shank bits and anassociated hex shank drill chuck.

Please always test the fit and connection of the BullseyeBore Core product on your chuck face prior to any operations. Most standard hex chucks require installation of an optional Standard Chuck Alignment Guide. Always read and follow the BullseyeBore Core Safety Guidelines before attempting to use BullseyeBore Core or any BullseyeBore Core accessories in an actual drilling operation.


For more information about compatibility, please refer to the BullseyeBore Core Product and Accessory Compatibility Guide in the BullseyeBore Core product page.

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