Review on Rannb Cutter 4 Flute Shank for Cutting by Will Anderson

They worked great when new but are very easy to break. I have a SHAPEOKO and use a range of speeds to make carbide and 4 of them broke in 1 day. The fifth was about to break, but I replaced it with 1/8th of what I could. The cut length is perfect for the thin plywood I use. It generally works if you agree on what to break. I definitely had 1/16 bits that took a lot longer. I have another set to see if I can play around with the speeds to get better results. Will be updated after the attempt.