Reliable construction Made with copper and stainless steel for durability and long service life. The materials provide strength and corrosion resistance to support daily use. Enhanced security feature Thickened antitheft solid lock offers reliable protection. Access is available via an external key or an internal rotary button for flexible control and convenient operation. Easy installation Simple, userfriendly setup with no complicated steps. Designed to cater to DIY enthusiasts and professionals alike. Multifunctional usage Ideal for front doors, bedroom doors, hotels, and office spaces to meet diverse locking needs. Compatible with a range of door styles and environments. Use scenarios Home entry door: secure main entrance with dual access options, improving convenience and security for residents. Bedroom or guest room door: provides reliable privacy control without compromising accessibility. Hotel or office space: supports secure room access management for guests or employees, with easy operating options for staff.