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.
- Drill assortment kit offers 20 drills in plastic storage case with sizes clearly labeled
- Sizes included (#61-80): .0390" .0135" inches or .990 - .343mm
- Made of high speed steel with electroplated diamond particle coating