Class V 2.5" shank 3,000 lb. tongue weight 21,000 lb. towing. 12" overall length. 2 5/16", 2" and 17/8". Compatible with all 2.5" truck hitches. // Featuring patented Breakthrough One-Key Lock Technology the Receiver Hitch Lock works with your vehicle ignition key. Use the Receiver Hitch Lock to secure your hitch to your truck and never worry about losing or having to remember which key goes to your receiver lock again! The 5/8" diameter pin is suitable for Class 1-5 towing applications. Featuring an automotive grade lock cylinder and a stainless steel lock shutter and cap to keep out dirt and moisture, this lock comes with a solid stainless steel pin and a weather resistant jacket ensuring the long life of your lock.