This set of book bins includes a wire rack to instantly create an organized space. The metal wire rack is made of epoxy coated steel for ultimate durability. The bin will not tip over when placed in the rack, even when they are overloaded with books. All the bins come in bright colors and feature integrated carry handles for easy transportation.This set of book bins includes a wire rack to instantly create an organized space. The metal wire rack is made of epoxy coated steel for ultimate durability. The bin will not tip over when placed in the rack, even when they are overloaded with books. All the bins come in bright colors and feature integrated carry handles for easy transportation.