Internal Hex, Internal Torx, External Hex
2-1/2 ", 5/16 ", 5.5 mm, 11 mm, 1-3/8 "
3/4, 1/4, 2-1/2, 3/8, 1/2
Phosphated, Phosphatized, Gun-metal, Black Phosphate, Black Oxide
2-1/4 in, 3-3/4 in, 8 in, 43 mm, 5/16 in
12-Point, 7-Point, 8-Point, 6-Point, 4-Point
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