External Hex, Internal Hex, Internal Torx, External Torx
1-1/2 ", 1-5/16 ", 20 mm, 5/8 ", 1-3/8 "
1-1/2, 3/4, 1/4, 1/2, 3/8
Phosphatized, Phosphated, Gun-metal, Black Phosphate, Black Oxide
1-3/4 in, 8 mm, 17 mm, 2-1/2 in, 2-7/16 in
8-Point, 12-Point, 6-Point, 7-Point, 4-Point
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