A-OL2050IMP-AI 2050 Extended Pitch Offset Link (Import)One New Aftermarket Replacement 2050 Extended Pitch Offset Link (Import) for Agricultural and Industrial Equipment This No. 2050 extended pitch offset link (also called a half link) is used to join or adjust the length of 2050 extended pitch roller chain. The offset link allows connection of two chain ends without requiring an even number of links, making it essential for chain repairs and custom length installations on agricultural equipment,