I just received this item so have not used it yet. As is usual with this type of tool, buy it "after" you really need it. All I can say when I put it in is that it's solidly made. The concept is simple so I'm sure it will work as advertised. What I really like is that 2 saws with rails of the same diameter can be mounted on it at the same time. This applies to both larger and smaller sizes. Of course, you can also use saws of different sizes. It also has a good mount to fit snugly on the saws once screwed in. If I drill the wrong size hole again and have to use it I will update my review.