The Ninja blade is an ideal choice for cutting through green concrete within 3 hours of finishing. Cutting soft concrete requires precision, and our early-entry diamond saw blades allow you to cut control and relief joints quickly and cleanly. Our blades are made with the highest-quality diamonds, providing extreme reliability that will last for several projects to come. Whether you are a contractor or a DIY homeowner, the Ninja will help you get the job done right the first time, every time. Included with each blade is a free skid-plate to protect concrete joints from raveling. Take advantage of our low prices and fast shipping on all online orders.