Internal Hex, Internal Torx, External Hex, External Torx
1 ", 4 mm, 1-1/8 ", 5.5 mm, 1-3/8 "
1-1/2, 1, 3/4, 2-1/2, 3/8
Phosphatized, Gun-metal, Phosphated, Black Phosphate, Black Oxide
3-9/16 in, 8 in, 39 mm, 26 mm, 3-3/8 in
6-Point, 8-Point, 7-Point, 12-Point, 4-Point
-