Woodpeckers Miter Gauge Setup Blocks These setup blocks don't come out of a mold. We machine each one from solid phenolic using state-of-the-art CNC milling centers. And the fit on any miter bar nominally 3/8" x 3/4" is ensured by our patented leaf spring system. Whether your miter bar is over-sized, under-sized or spot-on, the leaf sprin