Don't know your experiance using a towbar so here are a few tips. Keeping the extending portion of the arms clean is very important. I have a routine of wiping them down before collapsing to the store position. I also lube them ocasionally with dry silicone. No matter what they will eventually need to be taken apart and cleaned and the locking lugs relubed with an anti-sease lubricant. No special tools are needed and a fairly easy DIY. I believe the instructions were included.
Don't forget to make sure they are fully locked in the extended position before towing. I have seen the results on several towbars of different manufacturers and the results arent pretty and probably quite costly. Enjoy your travles
Harold & Linda
2009 CT coachworks siena 35V
W22 Workhorse 8.1L. Explorer Sport toad,