External Hex, Internal Hex, Internal Torx
1/2 ", 4 mm, 5/16 ", 9/16 ", 15/16 "
1-1/2, 3/4, 3/8, 2-1/2, 1/2
Phosphatized, Gun-metal, Phosphated, Black Phosphate, Black Oxide
4-3/8 in, 56 mm, 3/4 in, 9/16 in, 8 in, 4-3/4 in
External Torx, 7-Point, 4-Point, 12-Point, 6-Point
-