Brass setup bars make it easy to accurately set the distance between the cutter and fence on your router table without damaging your carbide bit. For example, if you want to set the distance to 5/16″, simply place the 3/16″ and 1/8″ bars together between the fence and the cutter.
I first saw these bars on my favorite woodworking show: the Router Workshop. The show’s host, Bob Rosendahl, uses them extensively. The set pictured above features five precision solid brass bars — 1/8″, 3/16″, 1/4″, 3/8″, and 1/2″ square, and 2-1/2″ long. Of course, you can apply them singly or stack them together to create thicknesses between 1/8″ and 1-7/16″.
You can find brass blocks from numerous retailers, but this particular set is available via Amazon for $20 — $13 plus $7 shipping.