Designed for Big Horn, this 5mm self-centering bit provides dead on accuracy of shelf pin placement for your project when used with an appropriate template. Standard 1/4-Inch hex shank will fit power bit and quick change drill chucks. Our bit assembly is designed so the bit is removable when the time comes that it needs to be sharpened. 5mm self-centering bit can be used with Big Horn 19651 Pin Jig and Bit (sold separately) or other templates with 3/8-Inch guide holes.