External Torx, Internal Torx, External Hex, TX, Hex
Imperial, AF, Metric, Torx, SAE
15/16 ", 3/16 ", 18 mm, 9/16 ", 28 mm
1-1/2, 1/2, 3/4, 1, 2-1/2
25.4, 38.1, 6.35, 19.05, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide