All burs have a standard shank diameter of 2.32mm, which fit Jewellery Industry standard handpieces. These burs are supplied by Maillefer from Switzerland. Maximum suggested operating speeds are - 0.5 - 2.0, fine cut, 20,000rpm; coarse, 12,000rpm. 2.1 - 5.0, fine cut, 8,000rpm; coarse, 4,000rpm. The recommended speed is marked on each packet.
Burs are sold individually, in packs of 6 or boxes of 72.
** Use eye protection when grinding, polishing or drilling.