Internal Hex, Internal Torx, External Hex, External Torx
5/16 ", 2-1/2 ", 4 mm, 1-5/16 ", 1-3/8 "
1, 1/2, 1-1/2, 3/4, 2-1/2
Phosphatized, Gun-metal, Phosphated, Black Phosphate, Black Oxide
3-9/16 in, 8 in, 11 mm, 1-3/4 in, 15/16 in
8-Point, 12-Point, 6-Point, 7-Point, 4-Point
-