Internal Torx, Internal Hex, External Hex, TX, Hex
Imperial, Torx, Metric, AF, SAE
11/16 ", 13/16 ", 7/8 ", 3/4 ", 28 mm
1, 1/4, 1-1/2, 2-1/2, 1/2
38.1, 19.05, 25.4, 9.53, 12.5
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide