Product Description : abrasive material, dental abrasive material, dental abrasive drillAll burs are on a 1.6mm shaft Most modern galvanisation process, optimal working results,up to four different grain sizesguarantees an extremely homogenous,safe and lasting diamond coating of the instrumentswork great on PFM, chrome & ceramic materials,ideal for shaping and gross reduction.Excellent abrasive capacity & life. Long service life and high cutting capacity when preparing and separating porcelain, facing composites and model materials.