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