Extend your trailer hitch receiver opening and get an extra receiver with the same piece. This dual hitch extension gives you (2) 2" receivers so you can tow a trailer and use an accessory at the same time. Powder coated steel resists rust.. Provides an additional 2" receiver so you can tow a trailer and mount an accessory at the same time. Bottom receiver lets you tow a trailer or flat tow a vehicle. Top receiver is for hitch-mounted accessories only. Extends trailer hitch receiver opening to avoid obstacles. Get extra clearance for your trailer. Mount your bike rack without having to remove your rear-mounted spare tire