Eliminate Miter Cutting of Screen Frame Quick and Easy Push-In Installation. CRL Plastic Square Cut Screen Frame Corners for storm door insert panels. Fits 5/16" (7.9 mm) Screen Frame. Top corners have a retainer pin and come left and right hand per pack. Bottom corner does not have the retainer pin and is non-handed. Color: White. One Package (10 pairs per pack) Eliminate Miter Cutting of Screen Frame Quick and Easy Push-In Installation Fits 5/16" (7.9 mm) Screen Frame CRL Plastic Square Cut Screen Frame Corners for storm door insert panels. For use with 5/16 inch (7.9 millimeters) screen frame. Top corners have a retainer pin and come left and right hand per pack. Bottom corner does not have the retainer pin and is non-handed. Color: White Minimum Order: 1 Package ( 10 pair per pack.)