Attributes . 1/4 in, 5/16 in, 3/8 in, 10 mm, 11 mm, 7/16 in, 12 mm, 1/2 in, 13 mm, 14 mm, 9/16 in, 15 mm, 5/8 in, 16 mm, 17 mm, 11/16 in, 18 mm, 3/4 in . Names