The product is Lenox 2.5"Diameter Hole Saw. Easy to use. The product is manufactured in China.
The Lenox Tools 1212040DGHS Diamond Grit Hole Saw-40DG 2-1/2-Inch 63.5MM Hole Saw is designed for drilling holes in Porcelain, Ceramic, Slate, Granite, Glass and many other tough and delicate surfaces. The bit features a brazed diamond edge that lasts longer in tile and stone. You get fast and easy cutting and it requires low torque and little pressure to get the job done. The hole saw also allows for easy plug removal.