Bought in response to a question that the links open so you don't have to thread the harness. In short, the block that was sent to me does not open. I have no doubt that other models have received openings (I don't want to call anyone a liar) but mine definitely isn't opening. Unfortunately, it would be impossible for me to lay the lines for my application.
Roller Chain Link for Connecting Feet
3 Review
Enhanced Roller Chain Feet π Connecting Links: Improved Efficiency and Longevity
3 Review
π Forney 70421 Double Loop Chain: Must-Have 3-by-100-Feet Heavy-Duty Style
6 Review
π Maximize Power Transmission Efficiency with our Roller Chain Feet Connecting Link
3 Review