All of these punches are rated to make holes in our anodized aluminum strip. The heavy duty punch is more sturdy and will hold up to more use. Only the heavy duty punch should be used for thicker material than our strip, tags or scales - or for harder materials like stainless.
Lubricating the material you are punching will greatly extend tool life and give you better quality holes. Any saw cutting lube will work - such as the stick lube we sell. WD40 is excellent. I suggest wetting a piece of cloth and wiping the it across the piece before punching. You only need a tiny bit of lube. Its enough to lubricate about every 10th punch. Even though aluminum is soft, this is where lube is most critical.