SKIL 31-Piece Quick Change Drill and Drive Set, # 47291 Includes Quick Connect Adapter allowing the user to make fast changes from drilling to driving Includes 5 General Purpose 1/4" Hex Shank Drill Bits. Sizes: 1/16", 3/32", 1/8", 5/32", 3/16" Includes 16 1" Insert Bits for the 5 most common fasteners: Phillips, Flat, Square, Torx, and Hex. Includes 7 Nutdrivers: 3/16", 1/4", 9/32", 5/16", 11/32", 3/8", 7/16" Compact folding high-impact plastic case for safe storage and easy bit selection