Maximum Security 5/8 inch Standard Span Chrome Plated Hitch Pin Lock with 2 Round Tube Keys - Diversi-Tech's Hitch Pin locks are made from hi tensile strength forged alloy steel and chrome plated to prevent rusting and provide years of good looks. This 5/8 inch standard-span, chrome-plated, forged steel, tube-style hitch lock will secure your ball mount to your 2 inch receiver. It has an easy one-quarter turn operation and a lock that has a water-tight cap to keep the water out of the lock, preventing corrosion. The high strength ball interlock design prevents false locking. Includes 2 round tube keys. Limited Lifetime Warranty. Pin diameter dimensions approx. 5/8 inch ( for use on 2 inch x 2 inch receivers). Pin Length dimensions approx. 3 inch. Overall Length dimensions approx. 6 inch. 1 per package.