Internal Hex, External Hex, TX, Hex, External Torx
Imperial, AF, Metric, Torx, SAE
7 mm, 10 mm, 35 mm, 1-1/2 ", 11/16 "
1/4, 1/2, 1-1/2, 3/4, 2-1/2
19.05, 38.1, 25.4, 6.35, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide