Internal Hex, Internal Torx, External Hex, External Torx
5/16 ", 36 mm, 2-1/2 ", 4 mm, 1-1/2 "
Phosphatized, Gun-metal, Phosphated, Black Phosphate, Black Oxide
28 mm, 4-1/16 in, 4-1/8 in, 8 mm, 1-3/8 in
12-Point, 6-Point, 7-Point, 4-Point, 8-Point
-