This hardened steel driver bit features a KTX / #1 square tip for positive bit engagement and a quick change compatible shank. It was designed specifically for use with the Kreg Deck Jig. Comes complete with an included Allen Wrench and Depth Collar to ensure precise depth setting. This Deck Jig Driver Bit and the KTX Drill Bit which came with your Deck Jig, are fully compatible with standard 1/4 quick change chucks.