External Hex, Internal Hex, Internal Torx
1-5/16 ", 20 mm, 5/8 ", 1-3/8 ", 7/8 "
3/8, 1/4, 2-1/2, 1-1/2, 1
Phosphatized, Phosphated, Gun-metal, Black Phosphate, Black Oxide
4-1/16 in, 19 mm, 3/4 in, 9/16 in, 2-1/2 in, 3-3/8 in
External Torx, 12-Point, 7-Point, 8-Point, 6-Point
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