Internal Torx, Internal Hex, External Hex, Hex, TX
Torx, AF, Imperial, SAE, Metric
13/16 ", 5.5 mm, 5/16 ", 9/16 ", 11/16 "
1-1/2, 3/4, 1, 2-1/2, 3/8
9.53, 38.1, 6.35, 25.4, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide