Features:Grinding head using natural diamond powder， high hardness， wear resistanceHandle adopt high-grade stainless steel， high strength， no rustySpecifications:Materials: Stainless Steel + Diamond PowderSize: 42 x 7 x 30mmSpecific models: BR-30C DI-SS41， TR-11， TF-21EF， CR-22FQuantity: total 50Pcs(5 boxes， each box 10 Pcs)Package included:10 x BR-30C Dental Diamond Burs10 x DI-SS41 Dental Diamond Burs10 x TR-11 Dental Diamond Burs10 x TF-21EF Dental Diamond Burs10 x CR-22F Dental Diamond Burs