PVC post trim collar consists of 4-pieces for trimming your post wrap. No screws needed - uses ratchet type system that holds pieces together. Order quantity of 2 each to trim both top and bottom of post. This product can expose you to chemicals including Quartz (crystalline silica), which is known to the State of California to cause cancer, and Hexavalent Chromium, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov. - Diisononyl phthalate (DINP)