Carbide RRX AC Blue Cone long (⌀ 4.0/13.5)designed with extremely high durability, easy cleaning, a longer live service and reduced heat development. RRX is a special surface with two types of staggered toothing and a right-wound transversal cut usable on all metals, resin and composites.                                                         
AC-100-B-012-040 
Each bur comes in a set of 5.