Internal Hex, Internal Torx, External Hex
1-5/16 ", 5/8 ", 9/16 ", 5.5 mm, 7/8 "
3/8, 1-1/2, 1, 2-1/2, 3/4
Phosphatized, Phosphated, Gun-metal, Black Phosphate, Black Oxide
19 mm, 1-3/4 in, 4-3/4 in, 2-1/2 in, 11/16 in
4-Point, External Torx, 7-Point, 8-Point, 12-Point
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