Carvers find these miniature Nova sanding and polishing points answer many of their carving problems. You get the speed and high performance of our Nova resin-bond Diamond formulas in shapes and sizes for use on your carvings in the sanding and polishing processes. Mandrel size is 3/32" which fits most Foredom and Dremel power tools. Illustrations show approximate shape and size.Diamond Nova Miniature Sanding & Polishing Points solve many gemstone carvings challenges by offering the speed, high performance, and no mess of Diamond Pacific's legendary proprietary Nova resin-bond Diamond formulas in 2 sizes of 2 bur shapes for use on your carvings during the sanding and polishing processes. They are designed to avoid headaches while sanding those hard-to-reach areas to remove the coarse scratches from your latest lapidary masterpiece. Diamond Nova carvings points are a resin-bond Diamond compound bonded to a mandrel shaft for use in lapidary rotary tools. are slightly flexible and will wear away with use and abuse. Diamond Nova burs must be used with a lubricant like water or silicone extender fluid.