10-100mm Diamond Hole Saw Drill Bit Set Tile Ceramic Glass Porcelain Marble Hole Saw Cutter DescriptionDescription:10-100mm Diamond Hole Saw Drill Bit Set Tile Ceramic Glass Porcelain Marble Hole Saw Cutter Specifications: Material: Steel Length: 5cm Diameter: 10/25/40/55/70/85/100 mmQuantity: 7pcs Application: Glass, ceramic tile, marble, granite and other brittle hard materials. Features: 1.Unique opening design, drilling sharp, easy to operate. 2.Open hole, smooth, no broken edge, will not produce the phenomenon of tremor. 3.Small incision resistance,Improve the opening speed,Easy to trim after slotting. How to use: 1.Installed in an ordinary electric drill. 2.First 45 degree angle drill position, then the vertical drilling. 3.Force should be light slow, especially in the beginning of the drilling and drilling to slow. 4.When opening a hole operation, need to add water while operating.Package Included: 1Set x (7pcs) Diamond Hole Saw