ALL METAL & WATERPROOF: Selected quality and sturdy zinc alloy + aluminum material with multiple casting processes, corrosion-resisting, oxidation treatment, wear resistance, for long-term outdoor use. UV-resistant & waterproof surface keeps the lock from fading. FITS MOST RV DOORS: Fits Hole cutouts from 3.6INCH tall x 2.67INCH wide and door thicknesses from 1.25INCH to 1.5INCH. For doors with hinges on the right side. It can be used in a wide range of travel trailers, camper vans, trucks, cargo carriers, etc. Not fit CLASS A or CLASS C RVs. Please check your RV door's size before buying. GET YOUR UNIQUE KEY: Tamper-proof lock cylinder and thousands of random keycodes, each key is designed only for this lock. No other duplicates. Include 4 mechanical keys, no more having to pay extra to buy spare keys! EASY TO INSTALL: Install it within 10 minutes! With this lock, you can replace a broken lock yourself, thus avoiding expensive repairs. SAFE & PROTECTIVE: Interior and exterior assembly, silent design, and smooth switch, not card lock, with built-in deadbolt and function of back locking better protecting your goods from thefts, travel worry free. Color: A:Silver/B:White Material: Zinc Alloy + Aluminum Alloy<br><br>Package Contents: 1 x RV Entry Door Lock 4 x Keys Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.