HEAVY-DUTY TRAILER LOCK: Made from high-strength structural steel with an industry-leading thickness (8.89mm/ 0.35in), and weighing a solid 7.71 pounds, which is a fortress on wheels. Our anti theft‌ coupler lock is extremely impact-resistant and can resist sledgehammers, crowbars, and power tools, providing maximum theft protection for your trailer. STURDY AND DURABLE: Passed the professional anti-violence damage test, our security‌ tongue lock can resist sledgehammer, hydraulic shears and other tool attacks, the thickness and material of the trailer lock body are double guaranteed, lets you not have to worry about your trailer being stolen while parked or traveling long distances. Features a rust-proof powder-coated finish that withstands extreme weather, ensuring long-lasting performance in any environment. QUICK & EASY INSTALLATION: Our trailer tongue lock features a exclusive user-friendly design, no need to fuss around with complicated setups, you can even secure the ball hitch trailer lock with one hand and making it effortless to install and remove in 30 seconds. PLEASE CONFIRM THE SIZE OF COUPLER: Kohree Trailer Lock fits 2-5/16 and 2 couplers. Please make sure to double-check your coupler size and model for a perfect match. (NOTE: Some couplers of special models may not fit this trailer lock. If have any questions, contact the Kohree team please.) PROTECTIVE COVER: Trailer hitch locks come with 4 dust covers, like a weatherproof shield, guarding your lock cylinder against snow, rain, and sun damage. ASIN B0C6D1V5T3 Brand Kohree Item Weight 7.71 pounds Manufacturer Kohree Item model number KR1131-KO-US-FBA Product Dimensions 5.1 x 5.1 x 3.5 inches Manufacturer Part Number KR1131-KO-US-FBA Is Discontinued By Manufacturer No