Power Carving Bits, Burs, Cutters or whatever else you want to call them., these are the cutters that actually do the work. High Speed Burs are 1/16″ Friction Grip burs for use in high speed tools such as the NSK Presto, Ney Hurricane, Ney Grand Hurricane, Powercarver, Powercrafter, GRS 850 and more. Basically any high speed handpiece that uses the same bits that your dentist would use will accept these high speed engraving burs.