Internal Hex, Internal Torx, External Hex
9/32 ", 2-1/2 ", 4 mm, 10 mm, 1-3/8 "
1-1/2, 1, 2-1/2, 3/8, 3/4
Phosphated, Phosphatized, Gun-metal, Black Phosphate, Black Oxide
1-11/16 in, 8 in, 39 mm, 7/16 in, 11/16 in
12-Point, External Torx, 4-Point, 6-Point, 7-Point
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