...to buy my brother-in-law some new blades for his Sawzall.
Here are three blades I pretty much toasted a couple of days ago installing a doggie door through a stucco wall. These were all good quality bi-metal Lennox blades. Two of them were "plaster" blades and the third was a "demolition" blade. By the time I got the hole cut in the exterior wall, they were more like "plastered" and "demolished" blades. These are shown in reverse order. The first one that I used is shown on the bottom of the photo. I just about busted a gut laughing so hard when I pulled the blade out of the wall and saw the total lack of teeth. Kinda explained why the cutting had slowed down so much.