Internal Torx, Internal Hex, External Hex, Hex, TX
Imperial, AF, Torx, Metric, SAE
7/8 ", 5/16 ", 9/16 ", 25 mm, 35 mm
1-1/2, 3/4, 1, 2-1/2, 1/2
38.1, 25.4, 6.35, 19.05, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide