Internal Torx, Internal Hex, External Hex, Hex, TX
AF, Imperial, Torx, SAE, Metric
4.5 mm, 5.5 mm, 9/32 ", 5 mm, 5/8 "
1, 1-1/2, 1/2, 2-1/2, 3/8
9.53, 19.05, 6.35, 25.4, 38.1
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide