Internal Hex, Internal Torx, External Hex, External Torx
2-1/2 ", 4 mm, 16 mm, 5/8 ", 5.5 mm
Phosphated, Phosphatized, Gun-metal, Black Phosphate, Black Oxide
4-1/16 in, 1-1/4 in, 43 mm, 13/16 in, 2-7/16 in
8-Point, 4-Point, 7-Point, 6-Point, 12-Point
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