External Hex, Internal Hex, Internal Torx, External Torx
2-1/2 ", 4 mm, 5/16 ", 25 mm, 9/16 "
2-1/2, 1, 1-1/2, 1/2, 3/8
Phosphated, Phosphatized, Gun-metal, Black Phosphate, Black Oxide
4-1/8 in, 4-3/4 in, 39 mm, 13/16 in, 11/16 in
4-Point, 8-Point, 7-Point, 6-Point, 12-Point
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