Diamond Finger Milling Bits 20MM for Enlarging Shaping Grinding Edging Exsiting Holes of Porcelain Tile Ceramic Marble Granite M14 Thread Angle Grinder

【Size】Diameter: 20mm, Total length: 65mm, Working Depth: 50mm, M14 Thread, Grit: #50/60 【Vacuum Brazed Technology】Help to be durable and have a long sevice life with better finish 【Special Design】4 chip removal holes and the interior of the matrix. Designed for heat dissipation and provides longer working life. Dry or Wet Use 【Recommended Machine】: Suitables for M14 Thread angle grinder. Recommended RPM: 6000, maximum RPM: 11000. If you want to fit it on drills or other machine, you need an adapter, such as SDS,Hex, Round Plus Shank. Direct drilling is not recommended 【Multiple Application】Both Dry or Wet use,to Enlarge and Reshape previously cut holes in Porcelain Tiles, Hard Ceramic Tiles, Granite, Marble & Engineered Stones,and also be used to notch edges of tile to accommodate for pipes or wiring