【Materials】The strong alloy steel material，with a black durable powder coating，can withstand the risk of rust and corrosion，ensuring a longer service life 【Easy Installation】Installing trailer hitch extensions is easier and faster than expected，Just simply inserting the shank into your hitch receiver ，next insert the hitch pin and clip 【Withstand Traction Strength】This dual hitch extender is rated to tow up to 6000/600 lbs GTW/TW, and is compatible with most Class 3/4 hitch receivers 【Wide Applicqation】The bottom receiver is used for towing a trailer while mounting a bike rack or a cargo carrier.Top receiver used for accessories only (NOT INTENTED FOR TOWING USE)，Helps extend the 10 inch length, provides fault-tolerant space for towing work, and protects your vehicle from possible collisions during towing 【Design】Shockproof Design, anti-shock screws help eliminate noise during transportation，Reinforce Design，Makes the Dual Hitch Extension can withstand greater external forces dual hitch extension is compatible with most Class III/IV hitch receivers. It can not only be used for towing a trailer, ball mount or other towing accessory, but also mounting a bike rack or a cargo carrier on the top