Internal Hex, Internal Torx, External Hex
5/16 ", 26 mm, 18 mm, 5/8 ", 9/16 "
1, 1/4, 1-1/2, 3/8, 2-1/2
Phosphatized, Gun-metal, Phosphated, Black Oxide, Black Phosphate
3/4 in, 9/16 in, 36 mm, 3-9/16 in, 8 in, 39 mm
8-Point, 6-Point, 7-Point, 4-Point, 12-Point
-