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Your cart is empty.Upgrade your RV security with the Marsram Heavy-Duty Zinc Alloy Door Lock—engineered to outlast plastic alternatives. Crafted entirely from corrosion-resistant zinc alloy, this robust replacement handle withstands heavy use and extreme weather without cracking or degrading. Its thickened metal body deters break-in attempts, while the precision-matched cylinder ensures only your unique keys (4 included) can operate the lock, preventing unauthorized access. Weatherproofing is built-in: Sealing washers block moisture and dust from compromising internal components, maintaining smooth operation in all climates. Installation requires no expertise—everything needed arrives in the box (8 screws, 2 strike plates, 4 keys). Simply replace your old handle in minutes, thanks to its standardized fit for 2.75"x3.75" mounting holes and compatibility with door panels 1.25" to 1.5" thick. Ideal for travel trailers, fifth wheels, truck campers, and cargo haulers, this lock delivers reliable security for life on the road. Backed by a 1-year warranty and responsive customer support, Marsram guarantees your satisfaction. Reclaim peace of mind—install a door handle built to endure the journey.