This DeWalt Diamond Drill Bit has a diameter of 5/8 inches and is designed for use with power tools. It is perfect for drilling through hard materials such as tiles, granite, and glass. The high-quality construction ensures that it lasts longer and provides better performance than ordinary drill bits. The model number of this drill bit is DW5580, and it is brand new and never used. It is suitable for both professional and DIY use, making it an excellent addition to any tool collection.