180mm Diameter with 23 Hole Patterns to suit most ⁄” plunge routers (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.|Screw Pack to find the right screws easily and keeps them neat when not in use.