Manufactured by Europe's leading Worktop Jig company, the Aperture Jig is used for routing apertures including sinks and hobs. Use with a 12.7mm router cutter and 30mm guide bush. Supplied with 6 nylon pegs. Specifications: Cuts 40, 60, 80 and 100mm radius for 90° corners. 200mm external radius. For use with minimum 1600W hand routers.