External Hex, Internal Hex, Internal Torx
3/16 ", 11/16 ", 2-1/2 ", 20 mm, 1-3/8 "
1/4, 3/4, 1-1/2, 3/8, 2-1/2
Phosphatized, Gun-metal, Phosphated, Black Phosphate, Black Oxide
1-15/16 in, 3/4 in, 9/16 in, 12 mm, 1-7/8 in, 8 in
8-Point, 7-Point, 12-Point, 4-Point, 6-Point
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