External Hex, Internal Hex, Internal Torx, External Torx
2-1/2 ", 4 mm, 7/16 ", 1-1/8 ", 1-5/16 "
Phosphatized, Phosphated, Gun-metal, Black Phosphate, Black Oxide
11 mm, 19 mm, 4-1/8 in, 4-3/4 in, 26 mm
4-Point, 12-Point, 6-Point, 8-Point, 7-Point
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