Internal Hex, Internal Torx, External Hex, Hex, TX
Imperial, Torx, AF, Metric, SAE
7/16 ", 9/16 ", 3/16 ", 5/16 ", 1-1/2 "
1-1/2, 3/4, 1, 1/2, 2-1/2
6.35, 38.1, 25.4, 19.05, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide