EXPERIMENTAL PROOF:Door locks are upgraded through technology and materialsDefinitely the safety you have been looking for,After many tests and practice, The LEDMLSH door latch lock is 5 times stronger than the ordinary door latch lock. bringing you not only safety but also comfort STRONGER DURABLES:: Barrel bolt made with heavy duty steel ,the solid door latch has been tested more than 500,000 times operation. Latch lock used latest electroplating and polishing technology to ensure a perfect long lasting. High quality material which improves corrosion resistance, enhance wear resistance and hardness, protects the metal surface and have a good insulation performance. 5 MINUTES TO INSTALL:: Door latch lock is upgraded for better material and durability. The door latch is mounted on the door frame with an electric screwdriver and drill bit to complete the DIY barrel lock installation for less than 5 minutes. either side installation , the bolt can be pushed to left or right and bolt lock also can be installed on left or right. Barrel latch perfect for using on vertical, horizontal applications,In vertical using, the notch-in case holds the bolt in SATIFIED GUARANTEE::If you have any problems with Barrel bolt latch, please contact us by email, our staff will provide services 24 hours a day.