External Hex, Internal Hex, Internal Torx
2-1/2 ", 5/8 ", 9 mm, 1-3/8 ", 21 mm
1/2, 2-1/2, 3/4, 3/8, 1-1/2
Phosphatized, Gun-metal, Phosphated, Black Phosphate, Black Oxide
3-3/4 in, 8 in, 4-1/16 in, 3/4 in, 9/16 in, 13 mm
12-Point, 6-Point, 4-Point, 7-Point, 8-Point
-