Ordered these for a set of four drawers for the serving table and a combined storage unit. They looked fine out of the box and seemed to work and move perfectly, but once installed the lugs stuck to the rails, bent slightly and the ball bearings fell out everywhere! After several hours of fitting the ball bearings into place and folding the petals, I was able to open and close the drawers. I will consider another purchase from this brand. TO UPDATE; After posting the above review I was contacted by Andy and offered to replace it. He also said he would let his department know if there was a problem with the machining/tooling/etc. see if this problem can be solved. New slides have arrived and there doesn't seem to be a problem with them. With that kind of customer service and a desire to keep my customers happy if there is a problem, I was happy to give positive feedback on these slides and how Andy handled them! Thank you Andi!