Ryobi 089110109712 Replacement Switch Assembly Replaces: 16102010G, 889110109712 452080007 984407003 and 984406001. Fits: RTS10 10" Table Saw, RTS10G 10 IN. Table Saw, RTS20 10"Portable Table Saw, RTS21 10" Table Saw, BRTS30 10" Portable Table Saw This switch has four prongs.