The redesigned Rev-A-Shelf® Two-Tier Baskets make other 2-shelf units fail in comparison. With the heavy-gauge construction, ball-bearing slides on both baskets and multiple mounting points, this is the best two-tier unit available. With 100lb slides on each basket you don't have to worry about overloading or bending. Multiple sized width and depths are available, so you are sure to find the exact unit that fits your exact cabinet size. Optimize the performance, by adding the optional door mount kit to add a truly one-step opening/closing process (sold separately - 5WB-DMKIT).