Internal Torx, Internal Hex, External Hex, Hex, TX
Imperial, AF, Torx, SAE, Metric
8 mm, 7/8 ", 5 mm, 3/16 ", 9 mm
1, 2-1/2, 1-1/2, 1/2, 3/4
38.1, 9.53, 25.4, 6.35, 12.5
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide