Feature:1. Hole Drilling: With this drill bit, you will find it much easier to drill holes on the materials, reliable and useful.2. Clean Cutting: Thickened blade together with brazed design ensures high accuracy in clean cutting for perfect circles.3. Broad Utility: Allows for broad application for ceramic, glass, marble, tile, rock, granite and many other materials.4. Good Material: Diamond coated carbon steel has a sturdy structure, not easy to deform and very durable for long using.5. Easy to Install: Designed to have a light weight and a compact, both the storage and carrying are very convenient.Specification:Item Type: Diamond Drill BitMaterial: Carbon Steel + Diamond CoatingPunching Depth: Approx. 35mm / 1.38in.Package List:1 x Diamond Drill Bit1 x Storage Box (Random Style)Note:Start drilling at a 45 degree angle and drill the hole vertically when cutting the new moon shaped edge to prevent the hole saw from slipping. Never let your drill dry out, keep it moist and cool with water.