Internal Hex, Internal Torx, External Hex
9/32 ", 2-1/2 ", 4 mm, 1-1/8 ", 7/8 "
1, 1-1/2, 1/2, 2-1/2, 3/8
Phosphated, Phosphatized, Gun-metal, Black Phosphate, Black Oxide
8 in, 39 mm, 13/16 in, 15/16 in, 3-3/8 in
4-Point, 8-Point, 6-Point, 7-Point, 12-Point
-