Sommerfeld's Tools For Wood Introduces the Roundover Patented Radiused-Corner-Geometry on our Rail and Stile router bits.

Full 1/2" engagement on rail and stile for stronger joints and easier measurement of door part dimensions.The bits relieve stress, as it prevents the edge tear-out that is a common problem with every other brand. Shaper cutters have been made like this for a long time, but this is the first time it has ever been introduced on a router bit.