I am using a new bit I have not used before. It is a Melin AMG-808-E. It is a 1/4 inch 2 flute 60 degree helix (upcut) with 1.5 inch cut length. I have been cutting 1.5 inch treated wet wood all afternoon and it has been great. It is an industrial bit suitable for stainless, steel and alum. It is cutting this with very good edges. I still have to sand off the tabs and there are a few rough spots but that is grain direction. The bit was $28.50 so not cheap but not over priced. I ordered a couple of Yonico 14037Q from Amazon. They are straight 2 flute with 1.5 inch cutting depth. Hope I dont need them for this project.