I have used this on 18mm Europly birch plywood shelving that I make. I've used it to cut grooves/grooves in plywood and it fits perfectly. I had to push the shelves a bit, but they fit incredibly snugly with no gaps. The shelves were 24 inches deep so getting in was difficult, but if the shelf were less deep it would be convenient but not difficult. depth, and it cut through the entire project perfectly. As far as I can tell, it's still pretty sharp. I had to do 3 passes to get 3/8" deep but I also have a cheap router bit. Overall the racquet fits perfectly and holds up well. This thing saved me a lot of time compared to trying to make 2 different passes use it to get exactly 18mm and the results look great Would definitely recommend for use on 18mm plywood.
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