STURDY BLOCK - The child safety block is made of high quality ABS material, which is sturdy and durable. It can adhere to various surfaces such as glass, wood, plastic and metal. It can securely lock all kinds of sliding doors and windows, effectively ensuring the safety of children and pets. Protect your child - Ideal for preventing your child from entering areas such as swimming pools, floor-to-ceiling windows, balconies, medicine cabinets, etc. Which could endanger him. EASY TO INSTALL - Protecting your child at home is very easy with this device. Simply peel off the tape and stick it to the desired surface. Convenient Design: Thanks to the keyless design, you just need to press to unlock and press again to lock. Widely used - The adhesive strip used to hold the device is designed to be compatible with most sliding wood, glass and mirrored doors, it will stay in place even if your child pulls on it. Safe to use - One-step procedure for locking and unlocking, it is easy to determine by seeing whether this plastic child safety lock is really locked. Note: The data are all manual measurement, please allow 1 - 3cm error, due to the difference of light and display, there will be a certain color difference, depending on the physical object received.