External Hex, Internal Hex, Internal Torx
11/16 ", 2-1/2 ", 1 ", 4 mm, 1-3/8 "
1/4, 3/4, 3/8, 1-1/2, 2-1/2
Phosphated, Phosphatized, Gun-metal, Black Phosphate, Black Oxide
19 mm, 58 mm, 5/8 in, 3/4 in, 9/16 in, 4-3/4 in
External Torx, 6-Point, 4-Point, 12-Point, 7-Point
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