Internal Hex, Internal Torx, External Torx, TX, Hex
Imperial, Metric, AF, Torx, SAE
1 ", 5/8 ", 5.5 mm, 25 mm, 36 mm
2-1/2, 1-1/2, 1/2, 3/8, 1
19.05, 25.4, 6.35, 9.53, 38.1
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide