External Torx, Internal Hex, External Hex, TX, Hex
Torx, Imperial, AF, Metric, SAE
9/32 ", 11/16 ", 15/16 ", 17 mm, 9 mm
1, 1-1/2, 2-1/2, 3/8, 1/2
6.35, 9.53, 19.05, 25.4, 12.5
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide