Unlocks the potential of your router by providing improved concentricity and compatibility with Trend Guide Bushes|150mm Diameter with 9 Hole Patterns to suit most ?” trim routers, including 18V cordless models (see www.trend-uk.com for compatibility).|Precision Centring System ensures perfect concentricity between cutter and guide bush for pinpoint accuracy with routing jigs.|Reinforced Nylon delivers a low-friction, precise routing surface.|Quick Pattern Finder makes locating the hole pattern for your router quick and easy.|Reinforced Threaded Brass Inserts provide secure mounting points for guide bushes.|Includes M4 screws for router attachment.