External Hex, Internal Hex, Internal Torx
9/16 ", 5/8 ", 1-3/8 ", 7/8 ", 21 mm
1-1/2, 1, 3/8, 2-1/2, 3/4
Phosphated, Phosphatized, Gun-metal, Black Phosphate, Black Oxide
3-9/16 in, 8 in, 17 mm, 15/16 in, 3-3/8 in
External Torx, 8-Point, 6-Point, 7-Point, 4-Point
-