Our kitchen cabinets alread had a lower roll out shelf,  We wanted to add a second roll out shelf to two cabinets.  I mounted the Lynk Professional series roll out to a fixed shelf and it glides very smoothly and is very sturdy.  The only reason this was not rated a 5 star is that the slide rails are mounted under the rollout instead of on the side.  The added height is a smace robber.