OL80IMP 80OF 673-HL80 4-Pack of Universal Fit #80 Roller Chain Offset LinksPack of Four New Aftermarket Replacement #80 Roller Chain Offset Links Universal Fit This pack of four #80 roller chain offset links (also known as half links or crank links) is designed for use with standard ANSI #80 single strand roller chain with a 1 inch pitch. Offset links are used when a roller chain requires an odd number of pitches, allowing chain length adjustment, custom assembly, or quick field repairs on agricultural equipment,