The tracks arrived quickly and appeared well made. However, installing them on my Kubota KX018 excavator was very difficult. Despite retracting the idler wheel as far as it would go the new tracks required great effort to install. Placing the track on the drive gear and rollers was relatively easy, getting them over the idler wheel (fully retracted) required the use of my wheeled tractor to push on the track while engaging the elevated excavator track in reverse. Once on they both appear to be functioning well. I have been using the excavator with no issues, all appears well. Time will tell.