Diamond Dry Drill Bits for Drilling Tile Porcelain Stoneware Marble M5 External Thread

Item: Diamond Vacuum Brazed M5 External Thread Dry Drill Bits For Porcelain Stoneware Granite Marble Quantity: 1pc,5pcs Connection: M5 External Thread Specification:                  Diameter 5/6/8/10MM , Diamond Height: 9MM, Total Length 53MM,                 Connection: M5 External thread; Grit #40/50  Application:  1. Used for Drilling tile Porcelain Stoneware Granite Marble etc; 2. Dry or wet use, suitable for small battery angle grinder with M5 attachment. NOTE!!!  1)Recommended speed 6000RPM, maximum speed 11000RPM; 2)Do not apply excessive pressure when drilling. Feature:  1.High-quality diamond grains #40/45, provides faster drilling and a better finish; 2.Vacuum brazed technology improves product performance and prolongs service life; 3.Cooling wax keeps the bits cool and lubricated for dry drilling; 4.Small drill bit easier to control and more accurate.