Attributes . Standard 12-Point: 3/16 in , 7/32 in , 1/4 in , 9/32 in , 5/16 in , 11/32 in , 3/8 in , 7/16 in , 1/2 in , 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, Standard 6-Point: 4 mm, 5 mm, 6 mm . Names