The RackSolutions Dell PowerEdge R710 Slide Rails provide a significant upgrade over the standard Dell R710 rail kit because Dell's rails are not compatible with round hole, server racks, and the RackSolutions model is compatible with round, square or threaded server racks. Versatility is ingrained into every aspect of the RackSolutions Dell PowerEdge R710 Slide Rails' design. Not only are they compatible with square, round and threaded server rack holes, they also feature a mounting depth ranging from 18" to 31.5", a 28" extension range and do not require the standard Dell rail kit for installation. The slide rail is built with high-quality design principles applied to a stainless steel frame. The slides themselves feature ball bearing construction to ensure smooth and stable functionality. Other product features include an optional cable management arm and compatibility with kits for 2 post center or 2 post flush mounting. The RackSolutions Dell PowerEdge R710 Slide Rails will ship with all of the necessary hardware for installation. As a result, buyers need only grab a Phillip's head screwdriver to assemble the product.