Internal Hex, Internal Torx, External Hex, Hex, TX
Torx, Imperial, Metric, AF, SAE
15/16 ", 7/8 ", 3/16 ", 14 mm, 5/16 "
1, 2-1/2, 1-1/2, 1/2, 3/8
6.35, 25.4, 9.53, 19.05, 38.1
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide