These are well made slide out shelves, but quailty control from Slide-A-Shelf is inconsistent.   2 of our shelves arrived damaged.  After getting the run around from Slide-A-Shelf, I contacted Wayfair and had a solution in less than 3 minutes.  

DO NOT ORDER DIRECTLY FROM SLIDE-A-SHELF!  They are about 30% cheaper on Wayfair, and Wayfair's customer service is much better - especially if you get a shelf or two that is damaged.