Hole Diameter: 60mm; Material: Metal, Diamond Particles, Diamond coating maximizes performance and maintains a sharper edge than traditional carbide or bi-metal hole saws. This diamond coated core drill bit removes a complete circle from glass, tile, marble, granite. Hole Diameter: 60mm; Shank Diameter: 10mm (3/8 inch); Total Length: 55mm The nickel plating on these bits maximizes the life of your tools with great corrosion resistance. The side holes allow for easy threading and removal after drilling, making them perfect for cutting precise holes in a wide variety of materials such as glass and ceramics. Specification: Hole Diameter: 60mm (2-3/8") Shank Diameter: 10mm (3/8") Total Length: 55mm (2-3/16") Quantity: 1 pc