Bench Dog 40-018 ProPlate Aluminum Predrilled (Group 1) Router plate and base enlarger for Group 1 routers; 2-, 2.625-, and 3.625-inch bit openings via reducer insert rings Insert rings include leveling screws and hold-down screws Accepts Bench Dog's Zero Clearance Insert, Pro Guard freehand accessory/bit guard, and Guide Bushing Adapter Fits all Bench Dog router tables and tops Limited lifetime warranty