[Rojodiablo]

I could not live without my sawzall, plain and simple. I like blades of 14 tpi for thinner material, and faster cutting. I like the 18tpi for thicker material. I find the 24tpi are so small, you can cut with them, but really only if you use the sawzall correctly. For best sawzall blade results: Vary your speed, and try to never just run it wide open. If you keep the speed on and off, the blade will clear the chips, and be able to bite the material. If you run it wide open and add too much pressure, the blades will glaze over, and get hot. All hope is lost once that happens!!! I have cut steel as thick as 1-1/2" with a sawzall, so that is not the problem. It's gotta be cut technique. As for blades?/ I buy Blu mol 10 packs at Home Depot. Much better price than buying single blades.
And, for aluminum, 14tpi or less. Aluminum will really gall up the blades, and it is tough to clear it once it has gotten stuck in the teeth.