ROLA 59508 NV2 Hitch Mount 2-Bike Carrier adjustable design accommodates both adult and childrens bike sizes Engineered to carry bikes by the wheels and not the frame, eliminating scratches Lightweight, durable aluminum support arms add peace of mind without adding bulk Support arms utilize multiple pivot points; stows upright for travel, extends to load bikes and folds flat for rear of vehicle access Patented flip shank fits 1-1/4 and 2 receivers