Check the listing for details. StewMac Precision Router Base, The Original, Designed by StewMac. Condition: New. Listed at 71.72 USD. A more stable way to support your Rotary Tool. Our sturdy, compact base is the best way to hold a Rotary Tool or Router for freehand routing, inlaying, widening fret slots and more. Made of machined steel, brass and aluminum, it features precision cutting depth adjustment with large thumbwheels to eliminate guesswork. Designed especially for stringed instrument work. Excellent control Easy installation Accurate freehand routing Sturdy, compact, and adjustable Each turn of the large knurled thumbwheels adjusts your Rotary Tool's cutting depth by .035" (.889mm). You can rout an inlay cavity that's precisely compensated for the thickness of the pearl and glue, for less sanding later. Tall twin handles give you excellent control for freehand routing, and you get a good view of your work. There's even a built-in nozzle for attaching a mini air pump to continuously blow away the dust—you'll rout inlay cavities more precisely, for a better fit requiring less filler. Installation is easy. Simply unscrew the threaded plastic collar on the nose of the Rotary Tool, and screw on the Precision Router Base. Its 3/4-12 thread fits: •4000, 400XPR, Professional, MultiPro™ and most corded models made since 1986 • Black & Decker Wizard™ and RTX™ • Our Foredom custom handpiece