I have the RBW Li'l-Rock'r 15,000lb hitch. When you slide into the pin you release a bar that slides in behind it. The pin is slightly loose so there is some movement and causes biers on the slide bar and this makes it hard to engage and disengage. I have to file the biers off the bar occasionally and I try and keep it greased.
2012 Jayco Eagle 321RLTS
2008 Dodge Cummins 3500 DW Crew Cab 4x4 6 speed Auto, Exhaust Brake