Internal Hex, Internal Torx, External Hex, Hex, TX
Imperial, AF, Torx, Metric, SAE
9 mm, 5/8 ", 11/16 ", 1-1/2 ", 10 mm
1-1/2, 3/4, 1/4, 2-1/2, 1/2
38.1, 9.53, 25.4, 19.05, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide