Thank you for viewing! Used "Only One" gray plastic lock with a locking function. Used item. For preventing escape of small children °・*:.。.☆ It is recommended to install one each at the top and bottom, as even if the bottom lock is undone, the child cannot undo the top lock \( ˆoˆ )/ 【Dual Safety Device】 The Side Lock ZERO is equipped with a dual safety device, allowing for safe use. It provides additional security, especially for locking doors and gates. 【Easy Installation】 Designed to fit gaps of 30-45mm, making installation easy. No special tools are required, and anyone can easily install it. 【Reliable Lock】 The key-operated design prevents unauthorized unlocking from the outside. It is the perfect product for those who prioritize safety. - Brand: Only One - Product Name: Side Lock ZERO - Features: With dual safety device - With Key: Yes - Installation Method: Compatible with gaps of 30-45mm #Security #Window Lock #Burglary Prevention #Secondary Key #Fall Prevention