A roll-out shelf, also known as a glide-out shelf, pull-out shelf or slide-out shelf is a shelf that can be moved forward on slides in order to more easily reach the contents stored in the back of a cupboard or cabinet. The slide mechanism can also be found in modern chests of drawers. Cabinet makers have been installing roll-out shelves for over 50 years.
Roll-out shelf Wikipedia
Roll-out shelves are found in kitchen cabinets, pantries, bathroom cabinets and vanities, offices, and garages. They are available with 3/4 extension or full extension slides. The 3/4 extension slides provide enough access to reach items in the back of the cabinet. Full extension rails are more costly but can provide better access for special use areas.