Glass Premium Versatile Durable High-performance Efficient Porcelain Tiles Countertop Installation Woodworking Game-changing 100% brand new and high quality.   Made of electroplated ，Perfect to eliminate a full circle of glass, tile, marble, granite, ceramic or other materials.     Different sizes for you, make up a set, so that you no longer waste time to look for specifications,stable and durable to use.     product is installed in a professional drill or electric drill.     Can be used with a standard electric drill.     You must add cooling holes for water during operation.     This product is the efficient construction, installation hole of choice.   Specifications: Material: Electroplated Color: As picture shows Production Process: Electroplating Diameter: 6/8/10/12/14/16/18/20/22/25/26/28/30/40/50mm Quantity: 15pcs (Each size has 1pc hole saw drill)   Package Included: --15*Hole saw drills Notes: --Due to the difference between different monitors, the picture may not reflect the actual color of the product.     --Please allow 1-2mm error due to manual measurement.