Internal Torx, External Hex, External Torx, Hex, TX
Imperial, AF, Metric, Torx, SAE
15/16 ", 5/16 ", 5/8 ", 23 mm, 1-1/2 "
3/4, 1, 1-1/2, 2-1/2, 1/4
12.5, 19.05, 9.53, 6.35, 38.1
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide