Internal Hex, Internal Torx, External Hex
5.5 mm, 7/32 ", 2-1/2 ", 1-5/16 ", 1-3/8 "
1, 1-1/2, 2-1/2, 3/8, 1/2
Phosphated, Phosphatized, Gun-metal, Black Phosphate, Black Oxide
1-15/16 in, 30 mm, 8 in, 33 mm, 4-3/4 in
External Torx, 6-Point, 12-Point, 7-Point, 4-Point
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