External Hex, Internal Hex, Internal Torx
2-1/2 ", 4 mm, 5/16 ", 1-5/16 ", 5/8 "
1, 1-1/2, 3/8, 2-1/2, 3/4
Phosphated, Phosphatized, Gun-metal, Black Oxide, Black Phosphate
8 in, 4-1/16 in, 39 mm, 2-15/16 in, 11/16 in
4-Point, External Torx, 6-Point, 7-Point, 8-Point
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