External Hex, Internal Hex, Internal Torx
1-1/2 ", 5/8 ", 9/16 ", 15/16 ", 1-3/8 "
1-1/2, 1, 1/4, 3/8, 2-1/2
Phosphated, Phosphatized, Gun-metal, Black Phosphate, Black Oxide
8 in, 39 mm, 2-1/2 in, 2-7/16 in, 1-3/8 in
4-Point, External Torx, 8-Point, 7-Point, 6-Point
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