External Hex, Internal Hex, Internal Torx, External Torx
1-5/16 ", 5/8 ", 5.5 mm, 1-3/8 ", 1-1/4 "
1, 1-1/2, 3/4, 2-1/2, 3/8
Phosphated, Phosphatized, Gun-metal, Black Phosphate, Black Oxide
3-9/16 in, 8 in, 58 mm, 4-3/4 in, 39 mm
6-Point, 8-Point, 12-Point, 7-Point, 4-Point
-