Internal Hex, Internal Torx, External Hex
2-1/2 ", 4 mm, 5/8 ", 35 mm, 7/8 "
1/2, 2-1/2, 3/4, 3/8, 1-1/2
Phosphated, Phosphatized, Gun-metal, Black Oxide, Black Phosphate
3-9/16 in, 8 in, 4-1/16 in, 70 mm, 2-1/2 in
12-Point, 6-Point, 8-Point, 7-Point, 4-Point
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