External Hex, Internal Hex, Internal Torx
3/16 ", 2-1/2 ", 4 mm, 5/8 ", 1-3/8 "
1-1/2, 1, 3/8, 2-1/2, 1/2
Phosphatized, Gun-metal, Phosphated, Black Phosphate, Black Oxide
37 mm, E7, 8 in, 30 mm, 3-3/8 in
8-Point, 12-Point, External Torx, 4-Point, 7-Point
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