Internal Torx, Internal Hex, External Hex, Hex, TX
Imperial, AF, Torx, Metric, SAE
15/16 ", 5/16 ", 9/16 ", 3/16 ", 11/16 "
1, 1/4, 1/2, 1-1/2, 2-1/2
25.4, 19.05, 6.35, 9.53, 38.1
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide