Internal Torx, Internal Hex, External Hex, Hex, TX
Imperial, Torx, AF, SAE, Metric
3/16 ", 5.5 mm, 7 mm, 5/16 ", 1-1/2 "
9.53, 6.35, 12.5, 19.05, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide