Patented bit holding system forces bit surface to opposing side for maximum bit retention - strength. Heat treated socket bases for durability and service ability. Chrome sockets; S2 and alloy steel bits. Includes 1/4" Drive - T10, T15, T20, T25, T27, T30,E4, E5, E6, E7, and E8; 3/8" Drive - T40, T45, T50, T55, E10, E12, E14, E16, 1/8"-3/8", 2, 2.5, 3-8, and 10mm Hex; and 1/2" Drive - E18 Bit Sockets. Comes complete in blow mold case36 Piece Master Torx with Hex Bit Socket Set includes 1/4" - T10, T15, T20, T25, T27, T30,E4, E5, E6, E7, and E8; 3/8" - T40, T45, T50, T55, E10, E12, E14, E16, 1/8"-3/8", 2, 2.5, 3-8, and 10mm Hex; and 1/2" - E18 Bit Sockets packaged in a blow mold case.