External Hex, Internal Hex, Internal Torx
5/16 ", 3/16 ", 2-1/2 ", 4 mm, 15/16 "
1/4, 1/2, 2-1/2, 1-1/2, 1
Phosphatized, Gun-metal, Phosphated, Black Phosphate, Black Oxide
23 mm, 8 in, 4-1/16 in, 3/4 in, 9/16 in, 17 mm
8-Point, 7-Point, 6-Point, 12-Point, 4-Point
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