Internal Torx, Internal Hex, External Hex, TX, Hex
Imperial, AF, Torx, SAE, Metric
11/16 ", 13/16 ", 9/16 ", 5.5 mm, 26 mm
1, 1-1/2, 3/8, 2-1/2, 1/2
25.4, 38.1, 6.35, 9.53, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide