These Irwin Marathon(R) circular saw blades are precision tensioned and balanced to let you perform accurate cuts for superior performance. The #400 grit diamond ground teeth deliver a smooth finish, and the teeth are made with construction-grade carbide for durability and longer life. The blades feature a thin kerf that delivers faster cutting results and ensures longer motor life for your saw. The circular blade set includes one 40-tooth 10" blade and one 80-tooth 10" blade, so you can make rough cuts or get a trim finish to suit your project. The blades are compatible for use with benchtop and stationary saws.