External Hex, Internal Hex, Internal Torx
5/16 ", 1-1/8 ", 20 mm, 1-3/8 ", 5/8 "
1, 3/4, 2-1/2, 1-1/2, 1/2
Phosphatized, Gun-metal, Phosphated, Black Phosphate, Black Oxide
4-1/16 in, 70 mm, 1-1/8 in, 5/8 in, 39 mm
12-Point, 8-Point, 7-Point, 4-Point, 6-Point
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