REESE Towpower couplers, made of the highest quality steel construction, provide ease of use and security for your trailer. The adjustable lock nut secures proper ball tension while the trigger handle makes it easy to secure the coupler on the hitch ball. 1-7/8 In. ball size2-1/2 In. channel widthZinc finishTrailer gross vehicle weight of 2000 Lb.Class I Rating1 year limited warranty