Convenient for crime prevention and safety measures for windows and screens, this is a **Sash Lock (Slim Type)**. ✔ As a simple lock for windows and screens ✔ Easy installation, no tools required ✔ Slim design, inconspicuous ✔ Easy to use even in rentals 【Compatible Locations】 ・Sash windows ・Screen doors ・Sliding windows, etc. 【Condition】 New, unused 【Recommended Points】 Recommended for crime prevention measures when at home, and also to prevent children and pets from opening windows too wide. 【Notes】 ※ Please check the shape of the sash window for compatibility. ※ This is a simple lock and does not guarantee complete security. Instant purchase is OK. Feel free to comment if you have any questions.