Internal Torx, Internal Hex, External Hex, Hex, TX
Metric, AF, Imperial, Torx, SAE
3/16 ", 7/32 ", 11/16 ", 5 mm, 17 mm
1, 3/4, 1-1/2, 2-1/2, 1/2
38.1, 25.4, 19.05, 6.35, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Oxide, Black Phosphate