33-piece 1/4-inch and 3/8-inch drive bit socket super set provides for long life and maximum corrosion resistance. Through-hole design makes it easier to replace worn or broken bits. Bits made from high strength S2 steel; C-Clip retention groove in hex end provides secure hold on bit. Includes 6 TORX 1/4-inch drive bit sockets, 4 TORX 3/8-inch drive bit sockets, 16 hex bit sockets, 3 slotted screwdriver bit sockets, 3 Phillips screwdriver bit sockets, and POZIDRIV screwdriver bit socket. Full lifetime warranty.