External Hex, Internal Hex, Internal Torx, Hex, TX
AF, Torx, Imperial, Metric, SAE
7 mm, 9/32 ", 9/16 ", 5/16 ", 1-1/2 "
1-1/2, 3/4, 1, 2-1/2, 1/2
38.1, 9.53, 12.5, 6.35, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide