IRWIN 3533012C Double End Bit 2P/8-10 SL 3-1/2", Fastener Drive, 2 Piece,Irwin,3533012C" /> Each double-end bit combines 2 of the most common screwdriver bits for versatility Manufactured with industrial-grade S2 steel for maximum life and durability Each insert bit features #2 Phillips and 8-10 slotted drill bit heads 1/4" shank diameter 3-1/2" overall length