External Torx, Internal Hex, External Hex, TX, Hex
Imperial, Torx, AF, Metric, SAE
9/16 ", 3/16 ", 9 mm, 3/8 ", 29 mm
1, 1-1/2, 3/8, 2-1/2, 3/4
25.4, 6.35, 12.5, 9.53, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide