The CURT replacement Posi-Lock latch is easy to install and fits on our straight-tongue Posi-Lock couplers. It is made from hardy steel construction and has a durable zinc finish to protect from corrosion, wear and tear. A unique features of the Posi-Lock latch is its adjustable design. The lockable latch mechanism adjusts by tightening or loosening a bolt within the latch to ensure a firm hold on the trailer ball. This CURT Posi-Lock repair latch is designed to fit a 1-7/8" trailer ball and can be used on 2", 2-1/2" or 3" channel couplers.