Feature: 1. EASY INSTALLATION: The window restrictor comes with right directions, allowing you to install it according to your specific needs. It includes a 2.5mm thick flat plate base and mounting screws for easy installation using a screwdriver or drill bit. 2. EXCELLENT QUALITY MATERIAL: Constructed from excellent quality stainless steel, this window limiter is sturdy, robust, wear resistant, and has a smoothly design for long lasting performance. 3. SAFE AND SECURE: With an opening angle of 65° and a strong multi coil spring, this window limiter effectively prevents children from climbing out of window and causing accidents. It meets ventilation requirements without damaging the window. 4. VERSATILE APPLICATION: Suitable for both internal and external window with a 14-17mm distance between the window frame and sash, this window limiter is ideal for use in hospitals, hotels, homes, schools, shops, and more. 5. PACKAGE INCLUDES: You will receive a set of window limiter for the right installation, to accommodate your installation direction. Please check the product size meets your needs before purchasing. Specification: Item Type: Window Opening Limiter Material: Stainless Steel Size: Approx. 10 x 4.5cm / 3.9 x 1.8in Opening Angle: 65° Application: for Window Weight: Approx. 47.00g / 1.66oz. Package List: 1 x Stainless Steel Casement Window Limiter 4 x Screws 1 x Accessory