Internal Hex, Internal Torx, External Hex
4 mm, 5.5 mm, 1 ", 1-3/8 ", 7/8 "
1/2, 3/4, 1, 2-1/2, 1-1/2
Phosphated, Phosphatized, Gun-metal, Black Phosphate, Black Oxide
8 in, 16 mm, 4-1/8 in, 4-3/4 in, 11/16 in
12-Point, External Torx, 6-Point, 7-Point, 8-Point
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