Durable construction for reliable performance Built from copper and stainless steel to deliver longlasting strength and dependable operation. Enhanced security you can rely on Antitheft solid lock provides added protection. Locking and unlocking options via an external key or an internal rotary button for flexible, secure access. Easy installation for everyone Straightforward installation that does not require special tools or expert knowledge. Material and performance highlights Copper and stainless steel construction offers durability and corrosion resistance for lasting use. Dual access mechanism combines convenience (internal rotary button) with security (external key). Practical use scenarios Residential doorway: enhances security for main entry doors while giving authorized users quick access with a key or interior button. Storage rooms and sheds: helps deter theft of tools, equipment, or supplies with a reliable external key option and convenient interior control. Offices or shared spaces: provides controlled access to secure areas, balancing safety with ease of use for authorized personnel.