External Hex, Internal Hex, Internal Torx
5/16 ", 9 mm, 5/8 ", 1-3/8 ", 1-1/4 "
1/2, 1, 1-1/2, 3/8, 2-1/2
Phosphatized, Gun-metal, Phosphated, Black Phosphate, Black Oxide
1-11/16 in, 36 mm, 8 in, 58 mm, 1-1/4 in
6-Point, External Torx, 12-Point, 7-Point, 8-Point
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