External Hex, Internal Hex, Internal Torx
2-1/2 ", 1 ", 7 mm, 5/16 ", 1-1/8 "
2-1/2, 3/4, 1-1/2, 1, 3/8
Phosphatized, Gun-metal, Phosphated, Black Phosphate, Black Oxide
4-1/16 in, 33 mm, 39 mm, 13/16 in, 24 mm
External Torx, 12-Point, 6-Point, 4-Point, 7-Point
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