... and fast cutting,many size.Sizes: 3 3/4", 3.7/8", 4", 41/4", 55/8 ", 47/8", 6 ... ", 7.3/8", 4.3/4",5.1/8", 5.5/ ... 8", 5.7/8", 6.1/4", 6.3/4", 6.5/8 ... " 7.3/8" 9.7/8",11.1/2" etc as requested.Any inquiries ... 4 1/4"kingdream 3 blades of drag bit for soft formations