The DEWALT® plastic bins 2 pack are part of the DEWALT® workshop storage system and can mount directly to DEWALT® metal rail. They are perfect for storing small parts like nuts, bolts and screws and have a large front opening for easy access. They are constructed of heavy-duty composite plastic, designed to be strong and durable and can support up to 10 lbs. Each. Mounts to DEWALT® metal rails without tools or hardware.