The blade itself is pretty decent and cuts through drywall quite easily. HOWEVER, and this is very important, the threads holding the blade in the chuck are not tightened. If you're using a saw with a drill and you meet resistance, the blade will rebound and the saw will spin back free of the chuck, like a Bey-Blade top. I was on the stairs cutting holes in the ceiling and it almost flew onto my hardwood floor. I caught him but got a small cut on my fingers. It could be worse. Don't buy it. This is dangerous and you risk damaging your floors and fingers.