Internal Torx, Internal Hex, External Hex, TX, Hex
AF, Metric, Imperial, Torx, SAE
7/8 ", 5 mm, 5.5 mm, 5/8 ", 1-1/2 "
1, 1-1/2, 2-1/2, 1/2, 3/8
19.05, 9.53, 25.4, 38.1, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide