The CompactSubBase™ is ideal for edge routing, template routing, mortise routing and more. With a 6-3/4″ (170mm) diameter and integral handles, it provides improved stability and control over the small base plates provided on compact routers. This attachment is compatible with all compact and trim routers, making it the perfect accessory for your routing applications. CompactSubBase™ Universally compatible with most trim and compact routers The base is compatible with standard 1-3/16″ (30.2mm) diameter bushings Adjustable Mounting Inserts Universal mounting inserts used to mount your router to the base Comfort Grip Handles 360° rotational comfort grip handles, for maximum comfort while routing Mortise Pins Two mortise pins included, for cutting mortises in your workpiece There are two mortise pin mounting locations, depending on the thickness of your material