Internal Hex, Internal Torx, External Hex
3/16 ", 12 mm, 2-1/2 ", 4 mm, 5.5 mm
3/8, 2-1/2, 1-1/2, 1, 1/2
Phosphatized, Gun-metal, Phosphated, Black Oxide, Black Phosphate
5 mm, 8 in, 3/4 in, 9/16 in, 39 mm, 15/16 in
12-Point, 4-Point, 8-Point, 6-Point, 7-Point
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