ITEM NAME:U-BoU-Bolt Anti-Rattle Stabilizer Hitch Lock Down Tow Clamp for Trailer RV Truck Product Description Description: U-Bolt Heavy-Duty Anti-Rattle Stabilizer Hitch Tightener Lock Down Tow Clamp for Trailer RV Truck Features: 1. This anti-Rattle stabilizer is used to eliminate the noise, swing and rattle of the drawbar, ball bracket and hanging attachments (such as bicycle rack and cargo carrier). 2. Suitable for all 1-1 / 4" x 1-1 / 4" and 2 "X 2" receiver hook openings. 3. Can be used with Class I II III and IV accessories, quick and easy installation. Specifications: Product size: 120*102*78 mm/4.72*4.02*3.07" Gross weight: 724 g Material: iron Color: Black Product Type: Tightener Product function: It can prevent shaking, rocking and other actions of cargo transport vehicles, bicycle racks and trailer ball racks, etc, Applicable models: car trailer, truck, RV Notes: 1. There may be slight size deviations due to manual measurement, different measuring methods and tools. 2. The picture may not reflect the actual color of the item because of different photographing light, angle and display monitor. Included: 1 x Tightener Plate 1 x U Bolt 2 x Flat Washers 2 x Ring Washers 2 x Nuts.Product function: It can prevent shaking, rocking and other actions of cargo transport vehicles, bicycle racks and trailer ball racks, etc. Applicable models: car trailer, truck, RV. Suitable for all 1-1 / 4" x 1-1 / 4" and 2 "X 2" receiver hook openings.