Internal Hex, Internal Torx, External Hex, TX, Hex
Imperial, Metric, Torx, AF, SAE
7/8 ", 14 mm, 11/16 ", 25 mm, 28 mm
1, 1-1/2, 2-1/2, 1/2, 3/8
19.05, 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