![20-piece set of high-speed jewelers drill bits in sizes 61-80 20-piece set of high-speed jewelers drill bits in sizes 61-80](https://cdn11.bigcommerce.com/s-iic0hc/images/stencil/300x300/products/37866/47870/28.0542photo3__05959.1658864192.jpg?c=2)
![High Speed Steel Twist Drill Assortment Jewelers 20 Piece Set Size 61 to 80 High Speed Steel Twist Drill Assortment Jewelers 20 Piece Set Size 61 to 80](https://cdn11.bigcommerce.com/s-iic0hc/images/stencil/160w/products/37866/47871/28.0542__97914.1658864192.jpg?c=2)
These drills are made with a straight shank and a twisting bit. They are made of high quality steel with diamond coating for precise drilling. Used for drilling stone, glass, ceramic, and other hard non-metallic surfaces. The set includes 20 drills, the one drill of each size from 61-80 and they come in a handy plastic container. Always use a lubricant or water when using diamond coated drills.