In a world where power tools dominate most shops, hand tools can still help us out. For instance, a cornering tool, beautiful in its simplicity, does the same job as a router round-over bit, but it does it with no setup, sawdust, or noise. A cornering tool can actually cut a cleaner radius, without the machining marks you get with a spinning router bit.
A cornering tool, basically a small, simple molding plane, cuts with either a push or pull stroke. The two fixed fences, ground into the hardened steel with the cutters, stop the tool at the proper radius .
You can keep these cutters performing like new with a specially designed sharpening block. Each edge of the sharpening tool corresponds to one of the 1/16″, 1/8″, 3/16″, or 1/4″ radius cutters as shown in the diagram.
You can get a set with a sharpening kit for $30, or you can buy just the two cornering tools for $15 — they’re a fine addition to any woodworker’s toolbox.