Description: [CHILD SAFETY LOCK] The children protection window restrictor provides a safe solution for families with kids, preventing them from opening windows too wide and falling out accidentally. Adjustable window locks are neccessory window hardware accessories fittings for those families with elderly and young children at home. [STRONG AND DURABLE] Made of high quality stainless steel materials, the casement window stopper is rust-resistant and durable. Suitable for all types of casement windows, and fix the windows firmly. [EASY TO INSTALL] Casement window stay is easy to install and disassemble. Short or long window restrictor locks have four/eight different slots(according to your choose), which can adjust the opening and closing angle, convenient for you to open, close and lock the window. [WINDOW OPENING SIZE ADJUSTABLE] Window opening limiter allows you can control the opening degree of the window and ensures the window to be partially opened or locked in place, perfect for ventilation while keeping your home security. [WIDE APPLICATION] Sliding Window Limiter making it ideal for home, hotel, school, kindergarten, offices, companies, shopping malls, hotels. Specification: Color: white/grey Material: Stainless Steel Size Chart: Short - four Slots Window Restrictor Hooks: 10.6cm/4.17inch long - Eight Slots Window Restrictor Hooks: 16.6cm/6.54inch Package Includes: 1 Set Casement Window Opening Limiter (5 Pack) Note: Please allow slightly errors due to manual measurement and different monitors.