The new Rockler Dado Jig is a sliding sled with a groove that can be fine-tuned to fit a variety of lumber thicknesses, including thin plywood and lumber with odd thicknesses. Working in conjunction with the Rockler Straight Edge Clamp System (sold separately), the Dado Jig cuts the first should with a 1/2" router bit, then the user flips the jig around for the second shoulder; the offset is adjustable to achieve a final width of 1/2" to 1" wide. The Dado Jig adjustments are tool-free, and the jig is pre-drilled to accept routers with a standard PC 690 3-hole pattern, or can be drilled to accommodate other routers. The Rockler Dado Jig (item number 43476) is priced at $44.99.