Internal Torx, External Hex, TX, Hex, External Torx
AF, Metric, Torx, Imperial, SAE
7/32 ", 7/16 ", 16 mm, 9/16 ", 9 mm
1, 2-1/2, 3/8, 1-1/2, 3/4
19.05, 38.1, 9.53, 25.4, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide