Excellent, high quality blades that can tackle most any heavy duty job, don't confuse these with thin wall blades that you can buy that are only good for a cut or two. These are the best of the best for what they are designed for. If you need a blade for some basic around the house cuts, use the cheap blades that are easily disposable. These are more for the professional user although usable by anyone, they are on the pricey side, but in my opinion, well worth the money. The biggest problem I have when using cheap sawzall blades, especially when cutting metal, is that they get bent very easily, I'm constantly having to bend the blade back straight to continue cutting. These demo blades are twice as thick as standard blades and twice as wide, haven't bent one yet.