The socket base is made of heat treated Chrome-Vanadium Steel, and the bit is made of S2 Alloy Steel, which for professional and durability

Set Includes: 33 count Hex bit sockets: 1/4"Dr.: 5/64", 3/32", 1/8", 5/32", 3/16", 7/32", 1/4", 2mm, 2.5mm, 3mm, 4mm, 5mm, 5.5mm, 6mm;3/8"Dr.: 9/32", 5/16", 3/8", 7/16", 1/2", 7mm, 8mm, 9mm, 10mm, 11mm, 12mm;1/2"Dr.: 9/16", 5/8", 11/16", 3/4", 14mm, 15mm, 17mm, 19mm;7 count Accessories:1/4"F to 3/8"M, 3/8"F to 1/4"M, 3/8"F to 1/2"M, 1/2"F to 3/8"M Adapter, 1/4" to 1/4",3/8",1/2" dr.Impact Drill Adapter;14 count E-Torx Sockets: 1/4"Dr.: E4, E5, E6, E7, E8;3/8"Dr.: E10, E11, E12, E14, E16, E18, E20;1/2"Dr.: E22, E24;17 count Torx Bit Sockets: 1/4"Dr.: T6, T7, T8, T9, T10, T15, T20, T25, T27, T30;3/8"Dr.: T40, T45, T47, T50, T55;1/2" Drive: T60, T70

High contrast and specific size marking for .It helps you select the size easier

It is an essential tool for working on , , bicycles, lawn equipment, appliances, machinery, etc

It comes with a sturdy and convenient storage case. Keep each in the proper position. products meet or exceed ANSI performance standards