LETTER MARKED HOLES: New letter marked predrilled holes on our 71369 router base plate are an upgrade to the original 71022 router faceplate, and ensure precise accurate fit to each corresponding make/model as labeled on the compatibility chart. DURABLE ACRYLIC PLATE: Our router base plates for woodworking are constructed using high-quality clear acrylic for superior durability and visibility, ensuring precise flush trim and other fine woodworking cuts with clarity and accuracy. EASY & QUICK INSTALLATION: Comes with a centering pin and mounting screws to ensure quick setup and accurate alignment from the base to the center of the router collet. Compatible with Porter Cable style template guides, great for your projects! VERSATILE COMPATIBILITY: Pre Drilled holes designed to fit popular router brands: Porter Cable, Bosch, Craftsman, Dewalt, Hitachi, Makita, Milwaukee, Ryobi, etc. Check our fitment chart for specific models to ensure easy integration with your router. 40 YEARS WOODWORKING EXPERTS: POWERTEC manufactures high quality best selling woodworking products from machines, accessories, measuring equipment, and tools. Each product is meticulously designed to exceed your needs and get projects done!