Internal Torx, External Hex, Hex, TX, 6-Point
Imperial, AF, Torx, Metric, SAE
3/16 ", 5.5 mm, 11/16 ", 26 mm, 1-1/2 "
1-1/2, 3/4, 1, 2-1/2, 3/8
38.1, 9.53, 6.35, 25.4, 12.5
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide