Internal Hex, External Hex, Hex, TX, External Torx
Metric, Imperial, AF, Torx, SAE
15/16 ", 7/8 ", 9 mm, 35 mm, 1-1/2 "
1-1/2, 3/4, 1, 2-1/2, 3/8
38.1, 6.35, 25.4, 9.53, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Oxide, Black Phosphate