CURT A-frame couplers mount onto trailers with an A-shaped tongue. They are stronger than straight-tongue couplers and are especially common on RV trailers. This A-frame coupler features a Posi-Lock latch to be easy to operate and quick to adjust, using a simple bolt within the latch mechanism. Made of steel with a durable zinc finish to protect against corrosion, wear and tear. Spring and nut Posi-Lock mechanism allows for easy adjustment. Constructed from die-cut, punched out steel. Protected by a durable zinc-plated finish. Mfr. 3 year warranty Fits a 2"" diameter trailer ball Accepts a safety pin or coupler lock Passes SAE-684 performance testing as a class 3 coupler | Curt A-Frame Class 3 Coupler