Description: ✔M14 brazed milling head, working length 50mm, made of high quality diamond particles, used for rock drilling and edge grinding. Used on Angle ✔Grinder Wide Applications-Recommended for enlarging, shaping and/or round beveling existing holes in porcelain tile, ceramic, bathroom tile, marble and countertop with ease, necessary to adjust pipes or electrical ✔wire High Performance-This diamond milling bit helps to be durable and have a long life, you can make the hole smoothly without wandering ✔Cost Effective-You can use only one size core bit and this finger bit, To create different sizes of holes that will save you money significantly! ✔Angle grinder machine 5/8-11 thread Technical data: Diameter: 30/25/20mm Working depth: 50mm Thread: M14 thread