Anti-tilt locking device. To get a updated version you can search for the ASIN B07NP82M1T on Amazon. Loading ramp and Designed to safely carry up to 500 lbs.This is a great way to your motocross bike scooters and off road dirt bikes. It’s heavy-duty steel frame makes it reliable and gives it strength and durability. It’s portable in design and features a ramp making it easy to load your bike onto the carrier.Anti-tilt locking device prevents wobble; Heavy-duty power-coated steel construction; Easy assembly 8 bolts and nuts; Made for a 2″ square receiver class II III IV OR V trailer hitch; Multi-load load from either side. Main hitch tube: 18″L; Loading ramp: 38.5″L x 4.75″W; Carrier overall dimensions: 76″L x 7″W. PLEASE NOTE:Trailer hitch pin not included!! Including installation instructions!! EASY TO INSTALL: The motorcycle transporter can be easily assembled and operated reducing the hassle of trailers and trailers. The sturdy and durable frame is made of high-strength steel to resist peeling scratching fading and abrasion.