The multimaster is a great tool but the blades are a real disappointment.  Bought a set of these even higher priced blades with the expectation that they would last longer and went through two of them in a matter of hours.  The teeth are just weak and wear out or break off easily.  I was doing nothing more than cutting 2x4's and some 3/4" pine subfloor and 1/3 of the teeth just broke off on one and the other dulled so quickly that it just started burning through the wood.  So much for spending more.  These blades need to drop in price by a lot or be re-engineered for reliability and longevity.