Internal Hex, External Torx, Internal Torx, Hex, TX
Imperial, Metric, AF, Torx, SAE
13/16 ", 3/16 ", 15 mm, 11/16 ", 29 mm
3/4, 1-1/2, 2-1/2, 3/8, 1/2
25.4, 9.53, 19.05, 38.1, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide