External Torx, Internal Torx, External Hex, Hex, TX
AF, Imperial, Torx, SAE, Metric
7/32 ", 9/32 ", 9/16 ", 5/8 ", 11/16 "
1-1/2, 1, 2-1/2, 1/2, 3/8
38.1, 9.53, 19.05, 6.35, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide