Features • Superior Diamond Coating: The diamond coating enhances drilling speed and sharpness, ensuring efficient and precise cuts through various materials • Versatile 100mm Size: Designed at 100mm (4in), this drill bit can be easily installed and used for a wide range of applications in home improvement projects • Efficient Clearance Hole: The built-in clearance hole allows for better cooling water flow and easy chip removal, maintaining optimal performance during use • Durable Nickel Plating: Features a nickel-plated finish for extended lifespan and improved resistance, keeping the cutting edge sharper for longer periods • Multi-Material Compatibility: Ideal for drilling into ceramics, tiles, limestone, slate, marble, light stone, and fiberglass, making it a versatile tool for various tasks Features: 1、Diamond Coating: Our open hole drill bit's diamond coating increases the drilling speed and sharpn of the drill bit. Electroplated diamond is uniform and more wear resistant. 2、100mm Specification: Diamond hole saw bit size is 100mm or 4in, you can install and use it according to the actual situation. 3、Clearance Hole: The diamond hole saw bit has a clearance hole that facilitates the entry of cooling water and the removal of chips from the hole. 4、Nickel Plated : This diamond hole saw drill has a nickel plated for longer life and improved resistance. Improves performance and maintains a sharper cutting edge. 5、Applicable Materials: Diamond hole saw bit makes the drilling proc easier. Suitable for ceramics, tiles, limestone, slate, marble, light stone and fiberglass. Specification: Item Type: Diamond Drill Bits Material: Diamond Specification: Approx. 100mm / 4in Use: Combined drilling glass, ceramic, porcelain, tile, ceramic tile, limestone, slate, marble, light stone and fiberglass Package List: 1 x Diamond Hole Saw Drill Bit 1 x Storage Box Note: Not suitable for drilling holes in tempered glass, plastic and wood. Package List 1 x Diamond Hole Saw Drill Bit 1 x Storage Box