With the APEX 446-2X-250PK Insert Bit, you will be able to work on projects more efficiently. The hex shank size of 1/4" is compatible with most drills and drivers. This #2 Phillips insert bit has a 1 in. overall length and is made of S2 steel. Its hex shank allows it to fit into drill chucks easily and securely. The APEX Insert Bit is designed for convenience and ease of use, making it a great addition to your tool kit.