Feature:1. Diamond core bits are dry core bits that can perform perfect and clean drilling on tiles and other materials without water2. Hole saw kit is suitable for marble, granite, clinker tiles, roof ceramics, plastics, etc.3. The tile drill bit is suitable for all common angle grinders, so should be an indispensable part of every tiler's toolbox4. The drill bit is manufactured with a special vacuum brazing process. Therefore, this diamond tool has a long service life5. This is a practical hand tool, drilling size contains 20, 35, 40, 45, 50, and 68MMSpecification:Item Type: Hole Saw SetDrilling Size (metric system): Approx. 20mm / 0.8in35mm / 1.4in40mm / 1.6in45mm / 1.8in50mm / 2in68mm / 2.7inFastening Thread: M14Drilling Depth: Approx. 40mm / 1.6inDrill Bit Length: Approx. 60mm / 2.4inDiamond Height: Approx. 10mm / 0.4inColour: Black.Package List:6 x Drill1 x Storage Box