Each link's side plates bent when pushing the pins through causing seizure at the pin. Attempting to fix it by flattening or bending the plate back to it's original shape causes a cascading seizure at the pin of the next link, and the next link, until multiple are frozen rigid. It's the ONLY chain that is so temperamental you have to throw it away as soon as you've bought it, And it ain't cheap. Insult to injury: KMC does not CHOOSE to sell links or lengths long enough to accommodate mistakes. In fact it was too short to begin with, another set of problems I haven't encountered with any other chain. I'd say the chain was sub-par but it's really the company's inability or refusal to help the problem they've created whilst charging premium rates which is important here.
This is my go to half link chain, super strong, love the black finish and easy to install. Always fast shipping from KMC. Highly recommended.