SK HAND TOOL 33 Piece Super Bit Socket Set SK89039 33 Piece 1/4" and 3/8" Drive Bit Socket SuperSet This 33 piece set is made in the U.S.A. and is our most versatile bit socket set. Bit sockets feature SK's high polish SuperKrome finish, which provides for long life and maximum corrosion resistance. Through-hole design makes it easier to replace worn or broken bits: simply pop the old bit out and insert a new replacement bit. C-Clip retention groove in the hex end provides a secure hold on the bit while in use. Bits are manufactured to rigid standards using high strength S2 steel. 1/4" Drive - T10, T15, T20, T25, T27, T30 TORX Bit Sockets; 3/8" Drive - T40, T45, T50, T55 TORX Bit Sockets; 1/8", 5/32", 3/16", 7/32", 1/4", 5/16", 3/8" Hex Bit Sockets; 2mm, 2.5mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 10mm Hex Bit Sockets; #4, #5, #6 Slotted Screwdriver Bit Sockets; #1, #2, #3 Phillips Screwdriver Bit Sockets; #2 POZIDRIV Screwdriver Bit Socket. Packaged in a molded plastic case.