Quantity and specifications: including 2 x window restrictor locks. Each window lock has an inner hex with a key and can be tightened to the right by turning the hex key. High Quality MaterialMade of high quality zinc alloy, lightweight, equipped with soft plastic rubber buffers, scratch resistant and wear-resistant, easy to open, durable sliding doors and window locks. Easy to use: it is easy to install, does not require any other tools and can be easily installed in a window, easy and safe, durable to use. Powerful functions: place it on the window or door strip, prevent thieves and children from climbing on the window, improve air circulation and protect the safety and lock of family and children. Widely used: suitable for most aluminum alloy plastic windows, vertical or horizontal sliding doors and windows, such as homes and offices, ensuring security, window locks, door locks, large window locks, bedroom door locks or window door locks.