Feature:1. Simple Drilling: Supports both wet and dry use, the diamond hole saw ensures easier drilling, hole expanding, chamfering, cutting and more.2. Extensive Using: Allows for wide application on a variety of materials, including but not limited ceramic tiles, granite, marble, bricks, etc.3. Smart M14 Shank: Designed to have standard M14 shank, the hole saw drill bit has good stability in high speed, compatible with angle grinder.4. Great Materials: Combining premium diamond and C45 steel, the hole opener drill bit has sturdy structure, and very durable for long term use.5. Easy to Install: Light in weight and compact in size as well, the convenient installation can be quickly completed within several minutes.Specification:Item Type: Diamond Hole SawMaterial: C45 SteelDrill Handle: M14Hole Diameter: Approx. 20mm / 0.79in, 25mm / 0.98in, 35mm / 1.38in, 50mm / 1.97in, 75mm / 2.95in, 100mm / 3.94in. Applicable Machine: Angle Grinder.Package List:6 xDiamond Hole Saw1 x Storage Box