The Trend UNIBASE180 180mm Universal Plunge Router Sub-Base is designed to suit most plunge routers so that it unlocks the potential to deliver improved concentricity as well as compatibility with Trend guide bushes. The 180mm sub-base has a 23-hole pattern. The precision cutting system allows for the perfect match between cutter and guide bush to deliver exceptional accuracy when working with routing jigs. Thanks to the reinforced nylon design, there is minimal friction while the quick pattern finder makes location the hole pattern for your specific router easy and quick. The reinforced threaded brass inserts provides a secure mount for guide bushes.