This sliding window stopper lock is suitable for home and office use. The sliding window lock can maintain indoor air circulation while avoiding the hidden dangers of children and pets climbing on windows. In addition, it can keep thieves out. Our window locks are very small and convenient to carry to other places where you need our window locks. Portable, easy to move from window to window or take with you. The sliding window lock is made of aluminum alloy, durable and rust-proof, reusable. The sliding window lock consists of an Allen key, a lock body and a lock cylinder. Each window lock comes with an Allen key. You can use an adjustable wrench to slowly turn the nut to attach it to the window frame. Installation takes only 5 minutes. Sliding window locks can be easily applied to most environments, such as patios, sliding glass doors, sliding windows. hotels, homes, hospitals, schools and offices to provide children with a safe environment. Product Specifications: Size: Allen key: 49mm x 5mm Lock body: 30mm x 24mm x 24mm Lock cylinder opening: 10mm Material: Aluminum alloy Color: Silver, Yellow Quantity: 4 pieces Features: Made of aluminum alloy, thickened material, corrosion and rust protection, not easy to deform. It is not necessary to install additional tools, it equips a wrench in each window lock, which holds the frame with key control. Adds more security to your sliding doors and windows to keep you and your family safe indoors. Suitable for sliding doors and windows, such as patio doors, sliding glass doors, sliding windows, etc. Package includes: 4 x sliding window locks Notes: Please confirm the height of your window/door frames at least 1.5 cm/0.6 inches, the thickness of the frame no more than 1.6 cm/0.63 inches. Not applicable to the middle frame of windows, it is necessary to check your window frame before purchasing. Due to manual measurement and different monitor settings, please allow a small error in size and color. Our customer service team consists of experienced, professional and responsible staff. They will do their best to solve your problems and let you feel our sincerity and care. Buying our products means choosing peace of mind and peace of mind.