The Construx 4-1/2" x 24-tooth circular saw blade is for General Purpose use. It has carbide tips that is designed to extend the blade's use up to 4 x's longer than a standard blade . it is designed for cutting wood with thin, smooth cuts. The Construx 60-tooth, high speed, steel blade is great for high performance jobs. The high steel saw blade is ideal for sawing a wide variety of sizes and shapes such as extrusions, tubes, sheets, plates and some bar stock. Suitable for cutting sheet metal, aluminum, plastic and drywall. The Construx Diamond blade can cut ceramic tile, stone tile, backer board and cement.