Focal Point 21620 4 1/8-Inch Quick Clips System A Outside Corner Block 3-Inch by 3-Inch by 3 1/2-Inch, White Quick and Easy Installation No Need to find Studs and No Nail Holes to Patch Primed and Ready to Paint or Stain Focal Point Corner Blocks eliminate the need to Miter Corners Work with Quick Clip Compatible Moldings and Clips