This patented Leigh invention was designed exclusively for Porter-Cable 4200 series dovetail jigs, to provide almost dust-free routing and sturdy router support, for improved routing! All wood working machines produce sawdust! Routers and dovetail jigs produce particularly large amounts of dust and chips. Dust masks help but why not eliminate the problem at the source. With the innovative Leigh VRS1200 Vacuum & Router Support, Porter-Cable dovetail jig owners can enjoy almost dust-free routing and you and your stay clean. If the router does not sit flat while routing, the pins and tails may be poorly formed and not fit properly. The full width router support ensures the router always sits flat for safer, easier and more accurate routing. Bonus! The router can be securely parked out of the way when clamping boards in the jig. The Leigh Vacuum and Router Support works seamlessly with the Porter-Cable 4210, Porter-Cable 4212 and Porter-Cable 4216 dovetail jigs, whether you’re routing through dovetails, half-blind dovetails or box joints.