Izaya 58 Enterprises Inc. designs, produces, sells & distributes, and holds the patent rights to the Steal Shield Coupler Lock. This revolutionary coupler lock is produced to fit most A Frame, Lever Lock, and Bulldog style couplers commonly used on a wide variety of trailers used in the recreational industry ( marine, snowmobile, AtV, motorcycle, PWC, camping, etc) as well as the construction trades. The Steal Shield Trailer Lock is , in most cases, a "one size fits all" application and is available with a handy storage bracket that allows you to store the Steal Shield on the trailer when not in use. It also protects the coupler fron the elements like rain.snow, ice, etc and also from physical ***** from heavy duty steel and powder coated finish with a self enclosed high quality 7 pin lock, these imposing coupler locks will deter trailer theft and the property stored on them. Designed by a retired Police Officer with 30 years experience, these revolutionary couler locks do what they are designed to do. Steal Shield - Lock It and Leave It.