It has the third fold that increases safety and resistance.
The shelf is clinched in its four corners. It is wrapped in 5-piece per unit film.

HOOK SHELVING
The interlocking shelving is suitable for archiving or setting up warehouses. It is versatile and robust; it can be assembled in multiple combinations ensuring the biggest flexibility. It doesn’t need specific tools and bolts for the assembly. The basic configuration requires the use of: uprights, crosspieces, unified shelves, hooks and feet. Using the connecting bracket, the shelving supports the storage box. The uprights determine the height, the cross-pieces the depth.