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