CRL ACRS Corner Post Adaptors are used to join posts and horizontal railings together to form corners. These Adaptors are similar to the Straight Tee and Cross Adaptors, but they allow you to form tighter corners from 90 to 145 degrees. They attach in the same manner, but have been specially coped allowing them to attach more closely to each other on a post. Each set includes two Adaptors, and comes complete with all hardware required to complete a single corner. Important Notes: Due to the different alloy component parts and anodized finishes, the ACRS Satin Anodized Railing System's finish can be inconsistent from batch to batch. Therefore, the ACRS System and Component Parts should only be used for industrial applications like warehouses, garages, etc... where the general public is not going to scrutinize the finish.