I needed to order a specific size hole saw for a project I'm working on and no hardware store stocks that size. So Raven left. When I received the product I couldn't wait to get started. I had to drill two sets of holes and in my experience the first set had issues where the wood only burned through half way (1/2 MDF). Maybe it's the wood material or the drill bit I used. First set was with a corded drill then I switched to my Dewalt which had better results but some effects were similar. job done. He just slowed, taking his time to clear the debris stuck in his teeth halfway. This seems to be why it struggled midway, but overall I wish the performance was better. I might try using a Forester cutter next time, but right now I have a 1 3/16 diameter saw.