Kleer Lumber’s outside-corner trim with integrated nailing flange forms a 3/4-inch pocket around end cuts on vinyl, shake, shingle, and stone siding, creating a clean finish with no visible nails. The system incorporates a flat trimboard, J-channel brick, and corner piece for easy installation. Made from expanded cellular PVC, the corner will not splinter, rot, or swell, Kleer says. Components may be installed against the ground, masonry, or other wet surfaces. The 4-inch-by-20-foot corner retails for about $125, and the 6-inch-by-20-foot corner for about $180. kleerlumber.com