External Hex, Internal Hex, Internal Torx
4 mm, 8 mm, 1-3/8 ", 5/8 ", 7/8 "
1/4, 2-1/2, 3/4, 3/8, 1/2
Phosphatized, Gun-metal, Phosphated, Black Phosphate, Black Oxide
21 mm, 3/4 in, 9/16 in, 39 mm, 1-3/8 in, 2-15/16 in
12-Point, 6-Point, 7-Point, 4-Point, 8-Point
-