Military-Grade Hardened Steel Construction: Built to outlast harsh conditions, this trailer hitch lock pin set features a rugged 5/8” diameter pin forged from hardened steel. Unlike flimsy stainless steel or welded alternatives, its frameless design with black e-coating resists rust, corrosion, and brute-force attacks. Weighing 1.5 lbs, it delivers industrial strength without compromising portability.

Weatherproof Key Slot Cover for All-Season Protection: The innovative rubber key slot cap molds tightly around the lock core, creating an impenetrable barrier against moisture, dirt, and debris. This flexible seal ensures smooth key operation in rain, snow, or dusty terrains - no more frozen or jammed locks during critical moments.

Universal Fit for Class III & IV Hitches (2”/2.5” Receivers): Engineered with versatility in mind, this anti-rattle hitch lock pin seamlessly adapts to Class III and IV receivers. Five adjustable O-rings eliminate wobbling and noise, while the extended 5/8” pin securely fastens 2” or 2.5” hitch tubes. Enjoy a silent, shake-free ride on any terrain.

Advanced Anti-Theft Security with Dual Protection: Deter thieves with a zinc alloy lock core and tamper-proof plum blossom keyhole, designed for unique, pick-resistant operation. The dual safety system combines a spring clip and dual locking holes to prevent forced removal. Plus, customize the O-rings to eliminate slack and reinforce stability at high speeds.

Instant Push-to-Lock Mechanism for Effortless Use: Skip complicated tools - secure your hitch in seconds with the intuitive push-to-lock design. Two tubular keys enable quick, one-handed locking and unlocking, making it ideal for frequent travelers. Replace worn-out locks with this user-friendly upgrade for peace of mind on every journey.