These bits are great for a beginner CNC machine but if you are trying to sell a product it will not help. Bit 1/2 used a few times and worked fine the first few times. Larger bits are not sharpened to the end, meaning they will break and pierce the wood, not cut it. Many burning and wooden "hanging nails" remained. This was my first time using a 3/4" bit and I had to go through the toolpath 4 times to get it closer to the design I wanted. I like the big beats idea but they don't work.