Part arrived within a week with USPS tracking and it fit perfectly to replace the old broken part. I don't have to open my garage by hand no more. Good stuff, I'm planning to buy another coupler as back up.
My old steel rollers were about ten years old, and you never really notice how old and worn they are. What a difference! Quiet, smooth, and a lot less stress on the door opener.
Ordered the sensor parts which I thought was the problem, but it was a wiring issue in the system. We hooked up the new sensors anyway and they are working great. You get five stars......so far.