Proven Industries Puck Lock Set, Model 400XL, 3-Pack, Hidden Shackle, Keyed Alike, 6061 Solid Aluminum, Shackle Opening 1 3/4 x 1 3/4 x 7/8 in, Depth 1 1/4 in, Made in USA, Black

MAXIMUM TRAILER SECURITY: Protect enclosed rear and side doors from forced entry on the road or at the jobsite. Hidden, fully shielded shackles resist bolt cutters and prying, while pick-resistant cylinders deter tampering for dependable barrier protection in daily use. DURABLE ALUMINUM CONSTRUCTION: Rely on solid aircraft-grade 6061 aluminum bodies engineered to withstand harsh conditions. Corrosion-resistant materials help preserve performance in wet, salty, or dusty environments, delivering long-term reliability for commercial and personal use. CONVENIENT KEYED-ALIKE ACCESS: Simplify daily use with a matched key system across the set, reducing key clutter and speeding up lockups. Each lock includes 2 keys and uses a unique keyway that helps prevent unauthorized duplication while enhancing pick resistance for peace of mind. EASY HASP COMPATIBILITY: Equip enclosed trailer swivel hasps confidently with a generously sized rear opening that seats over common door hardware. The hidden-shackle design nests cleanly for low-profile installation, helping prevent tool leverage and snag risks during loading. ENGINEERED IN THE USA: Choose a locking solution developed with rigorous research and careful fabrication for dependable performance. Family-owned expertise focuses on safeguarding trailers and cargo with high-quality materials and precise manufacturing standards for peace of mind.