A Diamond Tile Hole Saw is a cutting tool with diamond grains fixed on the functional parts of the tool via a bonding material or another method. As diamond is a superhard material , diamond tools have many advantages compared with tools made with common abrasives such as corundum and silicon carbide . Features of Diamond Tile Hole Saw : Solid metal body with diamonds, good performance, and long life. 3/8 "diameter hole designed for drilling. Use in glass, ceramic, porcelain, tile, limestone, slate, marble, granite, stone, and fiberglass. Good work, the electric drill is not included here. Specifications: Product Name : Glass hole saw Material: metal Drilling diameter: 6 mm, 8mm,10mm,12mm,14mm Shank Diameter: 4.5 mm / 1/4" Length: 40 mm / 16/6 " Color : Silver Tone Net weight : 10 g