Internal Hex, Internal Torx, External Hex
2-1/2 ", 5/16 ", 20 mm, 9/16 ", 5/8 "
1, 3/4, 1-1/2, 2-1/2, 3/8
Phosphated, Phosphatized, Gun-metal, Black Phosphate, Black Oxide
1-1/4 in, 4-1/8 in, 39 mm, 17 mm, 1-1/2 in
12-Point, 4-Point, External Torx, 7-Point, 6-Point
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