Internal Torx, Internal Hex, External Torx, TX, Hex
Imperial, Torx, AF, Metric, SAE
5/8 ", 3/16 ", 5.5 mm, 19 mm, 7/16 "
1, 1-1/2, 2-1/2, 3/4, 3/8
9.53, 38.1, 6.35, 25.4, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide