Featuring an innovative grinding philosophy, these drills cut most materials with ease. 4 drill sets come with a cleaning stone.
4 Bur Hole Drill Set: (left to right)
2.9mm (325 grit)
3.3mm (600 grit)
Available in the following grits:
*Using the 1.6mm bur to drill a pilot hole, you progessively use the larger burs to enlarge the hole. The last two burs are finer grits and you are left with a 3.5mm hole @ a 600 grit finish ready for polishing.