Two Striper® Diamonds utilize P.B.S.® bonding that maximizes the exposure of diamond cutting surfaces – especially at the tips and upper circumference of the diamond instrument where most cutting occurs. Crystals placed evenly and precisely in a uniform matrix are fused permanently to a surgical-grade stainless-steel shank; they are guaranteed not to fall out. As a drill bit for a rotary cutting mechanism or handpiece, diamond burs are often used by dentists to grind down tooth surfaces in preparation for restorations. This process often leaves a rough surface that requires polishing.