Internal Torx, Internal Hex, External Hex, TX, Hex
Imperial, Metric, Torx, AF, SAE
3/8 ", 9/32 ", 7/16 ", 9 mm, 1-1/2 "
38.1, 6.35, 12.5, 19.05, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide