High quality material: The adjustable door and window lock is made of aluminum alloy, durable and rust-proof, and the key handle has a black plastic cover outside for long-term use. /p> Easy to install: Equipped with an Allen key and spacers, it can be fixed with just a wrench, no additional tools or drilling required. Hexagonal lock core design : Compared with other window locks, this window lock has a hexagonal lock core design, which makes it difficult to open the lock and prevents children from opening the lock. Function: Provides more safety when ventilating or fixing sliding doors and windows to prevent children from accidentally falling. Wide range of applications: suitable for all types of windows and doors sliding doors, the simple and elegant style is suitable for most families. (Please confirm whether the size is appropriate) Note: The data is all measured manually, please allow 1-3cm error due to differences in light and display, there may be some deviations. color differences, please refer to the actual item received.