Reliable trailer lock made of durable metal with improved construction. Includes two keys for convenience and ease of use. The lock is universally sized, with a 5/8" diameter and 3-1/2" length, making it compatible with Class III-IV trailers and 2" and 2-1/2" trailer hitches. The core is made of high-quality zinc alloy, which has anti-corrosion properties. Additionally, the lock is equipped with a rubber cover and eight rubber rings that protect the core from dirt, dust and water. The lock is capable of withstanding up to 30,000 pounds, which is twice as much as conventional locks.