Internal Hex, Internal Torx, External Hex, Hex, TX
Torx, Metric, AF, Imperial, SAE
9/32 ", 5.5 mm, 1/2 ", 17 mm, 5/8 "
1, 1-1/2, 1/2, 2-1/2, 3/8
19.05, 6.35, 25.4, 12.5, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide