The CURT Universal Tri-Ball Trailer Coupler Lock is engineered to be the ultimate in trailer towing security. It's highly theft-resistant and tamper-resistant, featuring built-in safety measures to keep your trailer safe. It offers security, whether your trailer is hitched up to your vehicle or left parked and unattended. This unique coupler lock has a lasso lanyard that is key-operated. It allows the trailer lock to be used while towing a trailer, keeping the latch locked in place. It can also be used in tandem with the triple ball mount to fully secure the coupler when the trailer is parked. The tri-ball is constructed from high-strength, glass-filled polymer. This blend of materials is exceptionally durable, and the orange color increases visibility to further deter tampering. The tri-ball lock fits all three industry-standard coupler and ball sizes: 1-7/8", 2", and 2-5/16".• Highly theft and tamper-resistant design with built-in safety measures• Unique tri-ball lock inserts into coupler and secures latch with lasso lock• Coupler lock can also be used while towing to secure the trailer• Simple lasso design keeps all components together, avoiding lost pieces• Glass-filled orange polymer for high strength and increased visibility• Universal design fits all standard coupler sizes: 1-7/8", 2", and 2-5/16"• 1/4" pin allows adjustment to fit 1" to 3" coupler span• Easy-to-operate, 1/4-turn lock activation• Includes two keys for added convenience Lasso lanyard keeps latch locked in place even while towing trailer Triple ball mount fully secures coupler when trailer is parked Tri-ball lock fits all coupler & ball sizes: 1-7/8"", 2"", 2-5/16"" | Curt Universal Tri-Ball Trailer Coupler Lock in Orange