Internal Hex, Internal Torx, TX, Hex, 6-Point
AF, Imperial, Torx, Metric, SAE
7/32 ", 9/32 ", 9/16 ", 11/16 ", 3/16 "
3/8, 3/4, 1-1/2, 2-1/2, 1/2
19.05, 38.1, 25.4, 6.35, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide