Review on 🛠️ Efficient Rotary Spot Weld Cutter Set: 13-pack, Double-Sided, 3/8" HSS Remover Drill Bits for Power Drill Spot Welding, Hex Sheet Metal Hole Cutter by Chip Palmer

I wasn't expecting much. I usually use the Blair brand, but that's where it gets expensive. So I tried them out. Brand Blair. I get 1-5 holes per side, they are very brittle. I think there is 1 tooth fin). I've started a second 22 hole cutter so far. I do a lot of body work on classic cars and they work great. I use a 1/2" low speed air drill. Start slowly drilling the center hole for the spot weld, applying medium pressure once it starts to cut.