External Hex, Internal Hex, Internal Torx
5/16 ", 10 mm, 1-5/16 ", 23 mm, 1-3/8 "
1/4, 2-1/2, 1-1/2, 3/4, 1/2
Phosphatized, Gun-metal, Phosphated, Black Phosphate, Black Oxide
30 mm, 1-3/4 in, 58 mm, 8 mm, 39 mm
External Torx, 12-Point, 6-Point, 7-Point, 4-Point
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