Review on Precision Router Base - Original Design By StewMac, Optimized For Better Search Results by Richard Cartner

The only thing you have to watch for is the two adjustment on each side can be slightly off from each other. Which can make the bit slightly angled. You have to measure each side from the base to be sure it is the same. I use a machinists ruler. I'm sure calipers would work too. You also have to measure the depth of the bit.BTW, I use a Craftsman rotary tool and it fits just fine.As far as I know this is the only metal, precision router base made for rotary tools. StewMac is a luthier (stringed instrument makers) supply company. I congratulate them on making this available. There is a round, black, plastic "thing" here on Ebay and on the Dremel website. It's some kind of rough cut tool for construction work for use on easily cut materials like drywall. It cannot be used in any way, shape or form as a traditional router base. I know. I tried. Then, fortunately, I found this tool buried way down in an Ebay search. Even though my keywords fit it almost exactly. What's up with that Ebay? Are you trying to influence what I buy with a biased search engine? Naw, ol' Jeffy boy would never do that, ha! There is also one of these available directly from China. It's $20 cheaper but you would have to wait weeks for delivery. Reviews were lower for the China tool than the StewMac, which is also made in China. Perhaps StewMac exerts some sort of quality control?