Proven Industries 400XL Puck Lock Set - 2-Pack, Hidden Shackle, Black | Hidden shackle configuration, 6061 aluminum construction, keyed alike cylinders, 2-pack security set, USA-made.

MAXIMUM THEFT DETERRENCE. Secure rear and side enclosed trailer doors with a pick-resistant puck lock that conceals the shackle for added protection. The fully shielded shackle helps block bolt cutters and prying tools, while the robust lock body resists impact and tampering.

CORROSION-RESISTANT STRENGTH. Rely on rugged construction that stands up to weather and tough jobs. Solid aircraft-grade aluminum resists corrosion and tampering, and the protected shackle design helps prevent common attacks so your gear stays locked down season after season.

FITS ENCLOSED TRAILER HASPS. Install quickly on rear and side doors configured with swivel hasps. The enlarged rear opening on the 400XL accommodates common enclosed trailer hardware for a confident fit, helping ensure secure engagement and reliable daily use across routes.

CONVENIENT KEYED-ALIKE SET. Streamline access without juggling extras when managing multiple doors. Each lock includes 2 keys, and every key in the set operates both locks for simple operation, faster loadouts, and fewer hassles for owners, drivers, and fleet managers on every job.

MADE IN THE USA. Proudly manufactured to high-quality standards domestically to ensure reliable materials and craftsmanship with strict quality control and customer support. Tight tolerances and quality inspection help deliver consistent performance and dependable protection.