Easy Use: Just fix the shelf pilaster with a tool driving screws into wall and mortises, insert supporting clips and place boards or panels, then finish the convenient and easy installation. Stable Material: Made of iron material so having good strength and support capacity to give a long service life. Wide Application: Suitable for making bookcases, cabinets, shelves, closets, racks organization and storage system in your warehouses, rooms, kitchens, garages, offices, basements and so on, also can be used for house decoration and DIY requirements. Suitable for making bookcases, cabinets, shelves, closets, racks organization and storage system in your warehouses, rooms, kitchens, garages, offices, basements and so on Simply use a screwdriver and matching screws to secure shelf tracks, then install shelf clips and boards according to your needs Made of iron material, sturdy and wear-resistant, not easily deformed or bent, providing long-term support Multiple mortises of shelf rails and adjustable support clips allow for flexible usage and installation Package includes 20 sets of standard mortise mount metal shelving systems (1 shelf track, 3 clips and 3 screws for each set)