ALL METAL & WATERPROOF: high-quality and sturdy zinc alloy + aluminum material with multiple casting processes, -resistant, oxidation treatment, wear resistance, for long-term outdoor use. UV and waterproof keeps the lock from fading. FITS MOST RV DOORS: Fits holes from 3.6 inches high x 2.67 inches wide and door thicknesses from 1.25 inches to 1.5 inches. For right-hand hinged doors. It can be used in a wide range of caravans, trucks, cargo carriers, etc. Does NOT fit CLASS A or CLASS C RVs. Please check your RV door size before purchasing. GET YOUR KEY: Tamper-proof lock cylinder and thousands of random key codes, each key is designed only for this lock. No other duplicates. Includes 4 mechanical keys, no longer need 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, avoiding expensive repairs. SAFE & PROTECTIVE: Internal and external mounting, quiet design and smooth switch, not card lock, with built-in deadbolt and back-locking function that better protects your goods from theft, travel worry-free. Color: A: Silver Material: Zinc Alloy + Aluminum Alloy Package Contents: 1 x RV 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 +/- 1-3 cm.