TREND RBT1 ROUTABOUT JIG 18MM X 14IN SHANK Ideal for builders plumbers & electricians A 250mm diameter opening can be cut & made good in seconds Designed for use in new or existing 18mm chipboard or similar floors Cuts only the thickness of the board No waste the piece cut out is used to make good the floor All you need is a plunge router 750 watts or above A Unibase may be required for certain makes & models of router