Cutting concrete requires a special type of diamond blade to get the best cut possible. Diamond concrete blades use a hard bond to make cutting through concrete easier. Concrete is a soft material, so it's best to choose a hard bond diamond concrete blade. The harder bond does a better job cutting through abrasive surfaces like concrete. The hard bond will expose diamonds in the blade at the right rate, making sure you're always getting the best cut. We offer a 100% satisfaction guarantee on all our diamond concrete blades. If you're not happy with your purchase for any reason, we'll return your money, no questions asked.