Ideal for housing cuts where oversize or undersize board is used. Allows wider grooves to be routed by simply rotating the base. Made from clear plastic. Pre-drilled for Trend, Elu & De Walt routers. Can be re-drilled by user to suit other makes of router. The distance from the centre hole to the shortest edge is 100 mm., subsequent edge distances are 101 mm., 102 mm., 103 mm., 104 mm. & 105 mm. Size=200 x 200 x 8 mm. with 1.0 mm. offset.