Internal Hex, Internal Torx, External Hex
2-1/2 ", 4 mm, 5/16 ", 1-5/16 ", 5/8 "
1, 1-1/2, 2-1/2, 1/2, 3/8
Phosphatized, Gun-metal, Phosphated, Black Phosphate, Black Oxide
8 in, 21 mm, 58 mm, 1-1/2 in, 1-3/8 in
6-Point, 8-Point, 7-Point, 12-Point, 4-Point
-