Our 11-in-1 Screwdriver with Square Drive includes the 8 bits and 3 nut drivers most requested by professionals. Each square screwdriver bit size is marked on the tool's cap, allowing you to quickly identify them for increased efficiency. The bit prevents bit wear from hardened screws and extends bit life when fastening screws. The comfortable tri-lobe handles makes this screwdriver easy to grip, even during long projects. This 11-in-1 multi-bit screwdriver comes with a MILWAUKEE® limited lifetime warranty.