Internal Hex, External Torx, Internal Torx, Hex, TX
Imperial, Torx, AF, Metric, SAE
5.5 mm, 5/8 ", 1-1/2 ", 11/16 ", 10 mm
1, 1-1/2, 2-1/2, 1/2, 3/4
25.4, 6.35, 19.05, 9.53, 38.1
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide