... Tapered Medium FG1.6M Stalk used high-grade stainless steel 157 types for option High Quality Dental Products Dental Diamond Burs ... steelhigh strength, no rustymaximum speed to 400,000/min 157 types optional 157 typs in all for your option. Features:Natural emery ... 400,000/min..5 to each box, the total is 157 types,you can choose the burs types and at least ...