Internal Torx, Internal Hex, External Hex, TX, Hex
Imperial, Metric, AF, Torx, SAE
9/32 ", 5/8 ", 5.5 mm, 9/16 ", 25 mm
1, 1-1/2, 2-1/2, 1/2, 3/4
25.4, 9.53, 19.05, 6.35, 38.1
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide