Universal blades for green concrete, asphalt, and cured concrete are designed for use on low horsepower (13 hp and under) walk behind saws and high speed hand held saws. Green concrete blades, asphalt blades, and cured concrete blades are excellent for making intermittent cuts without water for patch repair work or for expansion joints. May be used wet or dry on low horsepower walk behind saws or high speed hand held saws.