External Hex, Internal Hex, Internal Torx, External Torx
2-1/2 ", 7/16 ", 23 mm, 1-3/8 ", 5/8 "
1, 2-1/2, 1-1/2, 1/2, 3/8
Phosphated, Phosphatized, Gun-metal, Black Phosphate, Black Oxide
5 mm, 8 in, 4-1/16 in, 26 mm, 1-3/8 in
8-Point, 12-Point, 7-Point, 6-Point, 4-Point
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