My trailer is factory built with the extension that slides into the trailer. I don't even know who made it "DRYD" is on the title and I could not find it on the internet. It has a stopping bolt at the end and another locking hole when you slide it all the way out. My first thought was to attach a winch so when on the ramp I could let it out then winch it in when haul out but I realize the time lost and impeding other boaters. So I guess I will chock the wheels pull ahead then re pin and launch.