This product is a set of 25 metal cut-off wheels for angle grinders. The wheels have a diameter of 4 1/2 inches and a thickness of 0.045 inches. They are made of aluminum oxide and are suitable for cutting applications. The package includes 5 wheels and the unit quantity is 25. The wheels are designed to work with 110V voltage and are black in color. The brand is DEWALT and the model number is DW8424B5. The wheels are made in China.