Internal Hex, Internal Torx, External Hex
4 mm, 7/16 ", 16 mm, 5/8 ", 1-3/8 "
1, 1-1/2, 2-1/2, 3/4, 3/8
Phosphatized, Gun-metal, Phosphated, Black Phosphate, Black Oxide
4-3/8 in, 3/8 in, 1-11/16 in, 1-7/8 in, 8 in
6-Point, 7-Point, 8-Point, 4-Point, 12-Point
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