Internal Hex, Internal Torx, External Hex
2-1/2 ", 4 mm, 18 mm, 1-3/8 ", 1-1/4 "
1, 1/2, 2-1/2, 3/8, 1-1/2
Phosphated, Phosphatized, Gun-metal, Black Phosphate, Black Oxide
3-9/16 in, 3/8 in, 8 in, 15/16 in, 3-3/8 in
External Torx, 8-Point, 4-Point, 7-Point, 12-Point
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