Reese Towpower Steel Universal 1-7/8, 2, 5-5/16 in. 9 in. Trailer Coupler LockThis REESE Towpower universal coupler lock prevents theft and keeps your trailer secure. The bright, yellow color is highly visible and deters thieves. It features a ratchet design with six locking positions for versatility, and is designed to fit 1 7 8 In., 2 In., and 2 5 16 In. couplers. Universal, fits all couplers Secures trailer when not being towed Ratchet design with eleven locking positions Fits 1 7 8, 2 and 2 5 16 In. trailers Bright theft