Item Type: Hole Saw Set_x000D_ Drilling Size (metric system): Approx. 20mm / 0.8in_x000D_ 35mm / 1.4in_x000D_ 40mm / 1.6in_x000D_ 45mm / 1.8in_x000D_ 50mm / 2in_x000D_ 68mm / 2.7in_x000D_ Fastening Thread: M14_x000D_ Drilling Depth: Approx. 40mm / 1.6in_x000D_ Drill Bit Length: Approx. 60mm / 2.4in_x000D_ Diamond Height: Approx. 10mm / 0.4in_x000D_ Colour: Black 1Diamond core bits are dry core bits that can perform perfect and clean drilling on tiles and other materials without water 2Hole saw kit is suitable for marble, granite, clinker tiles, roof ceramics, plastics, etc. 3The tile drill bit is suitable for all common angle grinders, so should be an indispensable part of every tiler's toolbox 4The drill bit is manufactured with a special vacuum brazing process. Therefore, this diamond tool has a long service life 5This is a practical hand tool, drilling size contains 20, 35, 40, 45, 50, and 68MM 6 x Drill 1 x Storage Box