This is a simple adjustable router dado jig. One fence fixed and one adjustable.
Using a pattern router bit (bearing on top), any dado width can be cut up to a couple of inches.
For a perfect fit for your wood, simple adjust the jig to firmly grip the wood intended to fit into the dado groove. Remove the wood and make the cut. You should have a snug fit. Note: the jig is made from ¾” plywood with ¼” hard wood facings to prevent wear.
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