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