The most secure and universal trailer coupler lock available, fits virtually all 1-7/8 Inch, 2 Inch, and 2-5/16 Inch tongue type trailer couplers. Made from the highest quality corrosion resistant materials, the unique design uses a hardened steel reversible “U” shaped shackle that allows the lock to fit almost any trailer coupler style, and always be accessed from the front. The solid engagement of the dual locking pins into both ends of the shackle provides the maximum security and peace of mind you can get in a coupler lock.