This REESE Towpower universal coupler lock prevents theft and keeps your trailer secure. The bright, yellow color is highly visible and deters thieves. It will work on standard, straight, rolled, Bulldog and surge brake couplers. Designed to fit 1-7/8 In., 2 In., and 2-5/16 In. couplers. Designed to fit 1-7/8 In., 2 In., & 2-5/16 In. couplers. Deters theft Rust resistant finsh
