External Hex, Internal Hex, Internal Torx
4 mm, 5.5 mm, 15/16 ", 1-3/8 ", 5/8 "
2-1/2, 1-1/2, 3/8, 1/4, 3/4
Phosphated, Phosphatized, Gun-metal, Black Phosphate, Black Oxide
28 mm, 4-1/8 in, 58 mm, 13 mm, 11/16 in
4-Point, 7-Point, 12-Point, 8-Point, External Torx
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