Internal Torx, Internal Hex, External Hex, Hex, TX
Imperial, AF, Torx, SAE, Metric
9/16 ", 8 mm, 5/16 ", 25 mm, 1-1/2 "
25.4, 9.53, 6.35, 19.05, 38.1
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide