The easy-to-use Jasper 390 XLC circle cutter router jig is here to bring you the best solution when you need to cut a perfect circle every time. The 390 XLC router circle guide is made from high-quality, polycarbonate, providing you with a long-lasting, durable, circle cutter. The precision tooled calibration disc allows for prefect centering on your router. The cutting jig comes with all screw hardware needed to attach securely to router, and pivot and centering pins to ensure perfect circle cutting. And perfect circles mean no more wasted wood. The Jasper 390 XLC router jig guide allows you to cut up to 184 different-sized circles with diameters ranging from 7 to 52 3/4 inches in precise ¼ inch increments. For makers needing decorative discs, table tops, circle cut outs, circle inlays, rings or circular engravings the 390 XLC is a must have tool. The router circle cutting jig is perfect for speaker makers, woodworkers, and DIYers. This allows the users to get fast and perfect useful circles at every use. The circle cutter router guide fit perfectly with 20 different routers including: AVID 104: BOSCH COLT GFK125, PR10E, Plunge PRO11, PR111: DEWALT DCW600, DWP611, Plunge DNP612: KOBALT 1439333: MAKITA XTR01, Plunge 195563-0: METABO M1808: MILWAUKEE M18FUEL2723-20, Plunge 48-10-5601 PORTER CABLE PCE 6430, 450PK: RIGID R86044B, R24012: RYOBI P601: CTOPO GO CT-370, HARBOR FREIGHT DRILL MASTER 64314 The circle template router guide stencil has easy and readable scaling that is calibrated for a 1/4-inch router bit. The router circle cutting jig guide is the perfect tool - or perfect gift - for woodworkers, speaker makers, and DIYers of every kind!