External Hex, Internal Hex, Internal Torx, Hex, TX
Metric, Imperial, AF, Torx, SAE
9/32 ", 5/8 ", 5/16 ", 7/16 ", 11/16 "
1/4, 1-1/2, 2-1/2, 1, 3/4
38.1, 9.53, 25.4, 6.35, 12.5
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide