Universal Trailer Coupler Lock Prevent theft and protect your property with this must have accessory for any trailer owner. Solidly built and tamper-proof, this lock provides peace of mind. Bent at the perfect angle for easy removal. Made from oil tempered spring wire. Clear zinc plated finish. Features a locking bar with 6 locking positions. Heavy duty. Fits 1-7/8", 2" and 2-5/16" couplers.