Internal Torx, External Hex, Internal Hex, Hex, TX
Imperial, Metric, AF, Torx, SAE
3/16 ", 4.5 mm, 7/16 ", 5/8 ", 36 mm
1-1/2, 1/4, 2-1/2, 3/8, 1/2
38.1, 25.4, 19.05, 9.53, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide