Review on Sipery Carbide Multiple Tooth Cutting Stainless: Superior Performance for Precision Cuts by Tim Evans

If you just need to drill a few holes this is great value. Unfortunately, on the second use, one of the carbide teeth broke the weld. I could still carve holes with it, but if you're looking for an everyday tool, this isn't the right tool for the job. Compared to a chisel, it drills a visually larger hole, but with a vernier caliper, the hole was exactly 28mm.