CURT straight-tongue couplers, featuring Posi-Lock latch, are the most common type of trailer coupler. With a mounting channel designed to fit onto a straight trailer tongue, the Posi-Lock coupler is easy to install. Steel construction with a durable zinc finish to protect against corrosion, wear and tear. Lockable latch mechanism is easy to operate and adjusts by tightening or loosening a simple bolt. Constructed from die-cut, punched out steel. Protected by a durable zinc-plated finish. Passes SAE-684 performance testing as a class 2 coupler. Mfr. three-year warranty Fits 2 1/2"" wide straight trailer tongues & 2"" trailer balls Spring & nut Posi-Lock mechanism allows for easy adjustment Features holes to accept a safety pin or coupler lock | Curt Class 35000 lb. Coupler