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