The Trend 180mm Unibase has 23 hole patterns and is suitable for most 1/2" plunge routers. It is made from reinforced nylon, ensuring a low-friction, precise routing surface for ease of use. It has a precision centring system, to ensure perfect concentricity between cutter and guide bush for precise accuracy with the routing jigs. A QR code features on the Unibase, to make locating the right hole pattern easy. Securely mount your guide bushes using the reinforced brass inserts. Includes a screw pack in a handy box, so you can find the correct screws with ease. Compatible with Bosch, DeWALT, Makita, Festool and many more routers. It's also compatible with all Trend guide bushes. 180mm diameter x 9.5mm thickness.