ORIGINALITY PROCESS: The RV lock is well-constructed with multiple casting process and aluminum alloy material. Featuring the high hardness, each side is carefully designed to be safe and . Oxidation treatment, wear resistance. Smooth surface, hand good sense of easy open. PREMIUM & Thickened solid base for stable installation Selected quality aluminum alloy and IPX3 waterproof material providing years of dependability and durability for longterm outdoor use. Additionally, the keys are made of ALL metal and it is not easy to fracture. LONR SCREWS: Comes with 4 EXTRA, 3MM LONR screws(12 total), not worry about screws too short or any unfit any more. Includes everything for installation: door latches, 4 keys, 12 screws and 2 plates, easy operation. VERSATILE DOOR LOCK: Fits most RV doors (hole cutout is 2.67'' x 3.6'' and door thickness from 1.25" to 1.5"). It can be widely applied in travel trailers, campers, trucks, horse trailers, cargo haulers, etc., practical for protecting the contents in cars. SAFE & PROTECTIVE With builtin deadbolt and function of back locking its much safer than normal lock. Inside and outside double open, mute design and smooth switch, not card lock, better protecting your goods and commercial material from thefts., Manufacturer: CSDASW