The Drop-Down Bumper Receiver Adapter transforms your bare 2" x 4" RV or travel trailer bumper into a sturdy 2" receiver, allowing nearly an endless array of attachments. Bike racks, storage totes, grill kits; you name it, it's probably available. The adapter easily installs around your continuous-weld steel bumper in just minutes and all mounting hardware is included. Do not use for towing purposes. Caution: Before installation, be aware that RV manufacturers may place load restrictions on their vehicle's bumpers. These load restrictions must be followed to create a safe RVing experience. If you are unaware of your bumper's load restrictions, please consult your manufacturer for information to ensure safe use.