Matching male and female cutters for door styles and spreaders. The cutters are arranged to work in conjunction with raised panel bits. Various forms are sized to joint material 17mm to 20mm thick. A B28 bearing is fitted as standard. The best method is to set up 2 router tables. 1 for the the side and 1 for the top of the frame. This will allow the operator to make easier adjustments to each cutter. Caution make the tongue and groove an easy slide fit.