Internal Hex, Internal Torx, External Hex, External Torx
5/16 ", 20 mm, 5.5 mm, 1-3/8 ", 7/8 "
2-1/2, 3/8, 3/4, 1/4, 1-1/2
Phosphatized, Gun-metal, Phosphated, Black Phosphate, Black Oxide
4-1/16 in, 8 mm, 39 mm, 1-3/8 in, 2-15/16 in
8-Point, 6-Point, 7-Point, 12-Point, 4-Point
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