Attributes . 1/4", 9/32", 5/16" / 8mm, 3/8", 7/16", 1/2", 9/16", 5/8" / 16mm, 11/16", 3/4" / 9mm, 6mm, 7mm, 10mm, 12mm, 14mm, 15mm, 17mm, 18mm . Names