Black & Decker™ On/Off Switch is designed for DeWalt® type 1 DW621-220, DW621 2 hp plunge routers, type 2 DW621 2 hp plunge router, type 3 DW621 2 hp plunge router, type 1 DW621K heavy-duty 2 hp router kit, type 2 DW621K heavy-duty 2 hp router kit, type 1 DW621-AR router, type 2 DW621-AR, DW621-B2, DW621-BR routers, type 3 DW621-AR, DW621-B2, DW621-BR routers.