Internal Torx, External Hex, Internal Hex, Hex, TX
Imperial, Metric, AF, Torx, SAE
9/16 ", 5.5 mm, 7/16 ", 26 mm, 11/16 "
1-1/2, 1/2, 1, 2-1/2, 3/8
12.5, 6.35, 19.05, 38.1, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide