Durable lock hardware built for dependable security and simple use Key benefits Reliable materials: Solid copper and stainless steel construction resists wear and delivers lasting performance and corrosion resistance where it matters. Strong antitheft protection: Thickened solid lock body offers robust security. Lock and unlock with an external key or the internal rotary button for convenient, secure access control. Easy, toolfriendly installation: Designed for straightforward setup so nonspecialists can install it without complicated tools or professional help. Versatile application: Intended for doors in homes, hotels, and offices, providing consistent security across residential and commercial environments. What it solves Stops worry about flimsy hardware by replacing weak locks with a heavyduty copper and stainless assembly. Simplifies daily use with two access options: key operation from the outside and a rotary button on the inside for quick locking. Eliminates installation delays and extra expense by enabling fast, reliable fitting without specialized tools. Important attributes Function: Mechanical lock with keyed exterior entry and interior rotarybutton locking. Materials: Robust copper combined with stainless steel for durability and corrosion resistance. Performance: Engineered for longterm, stable operation and dependable antitheft protection. Compatibility: Suitable for use on doors in residential and commercial settings such as homes, hotels, and offices. Typical use scenarios Home entry or interior doors: Upgrade front or bedroom doors to a more secure, durable lock with easy daily operation. Hotel guest rooms: Provides reliable, repeatable locking for frequent guest turnover while remaining simple for staff to operate. Office doors and meeting rooms: Adds a durable, tamperresistant lock for private offices or secure areas without complex installation. Includes the core functions and features from the original specification: copper and stainless steel construction, thickened solid lock, external key and internal rotary button operation, straightforward installation, and multipurpose use for homes, hotels, and offices.