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