The L-RACK-S component attaches to any L-Boxx or any other L-RACK-S. This allows you to add storage instantly to any size L-Boxx (1,1A, 2, 3, 3D, or 4). Combine multiple L-RACK-S shelves to create an organization structure to fit your needs. The L-RACK-S utilizes the same Single-Click stacking technology as L-Boxx The Bosch L-RACK is a customizable expansion option for the Click and Go System. Users can now choose to add new L-RACK drawers, i-BOXX Trays and organizer sets to expand their very own customized storage, organization and transport solution. Add a few L-RACKs to an L-Boxx (1, 1A, 2, 3, 3D or 4) to build specific tool kits or stack them high or side-by-side to create a stationary storage system in your shop. The entire system uses the same Single-Click stacking technology, so you can keep organized and mobile.