I wanted to tell anyone who is looking for these particular cutters about my experience with them and the company that makes them. I used these bits to convert 160 square feet of cedar planks into a stunning ceiling for my wife's she shed. On one of my runs, the tongue caught in a knot that bent the shaft. I contacted Kowood, the company that makes them, and asked if a replacement shaft was available as the bits worked great! Their support team responded quickly and sent me a 100% replacement. Guys, that's what I call fantastic customer service! If you are in the beat market you can't go wrong with this product or company!