Description: 【Material】:The trailer coupler lock is made of heavy duty aluminum alloy, copper  (lock core) and pp spraying material resists wear and impact, ensures long term reliability during use 【Versatile Use】: This trailer hitch lock is adaptable to different sizes of trailer balls such 1-7/8 inches, 2 inches, and 2-5/16 inches. It meets pairing needs of various vehicle models and trailers, making it widely applicable for caravans, yacht towing, motorcycle trailers and more 【Easy to Install】:The trailer hitch lock is easy to lock system, which can be install conveniently 【Unique Locking Mechanism】: The unique locking mechanism paired with matching keys prevents unauthorized individuals from easily dismantling the trailer hitch lock. This protects your trailer and its contents from 【Package Contents & Dimensions】: The package includes 1 trailer hook lock (with 2 keys) and 1/4 inch small trailer lock (with 2 keys) Specification: Material: Aluminum alloy  copper  pp spraying Size Chart: Package Size: 13.5 cmx10 cmx7.6 cm/5.31 inchx3.94 inchx2.99 inch Package Includes: 1 Trailer Hook Lock (With 2 Keys) 1/4 Inch Small Trailer Lock (With 2 Keys)