Ozone Wi-Fi Smart Door Lock for Wooden Swing and Sliding Doors with 3-way access | Door Thickness: 35-60 mmOzone's Glass Door Locks are carefully crafted to provide excellent security and a user friendly experience. Embrace the convenience of keyless access and an elegant design. Build Quality This lock is made from high quality material and is designed to withstand the demands of a busy household, with superior construction that has been tested to ensure optimal performance. It has 1 stainless steel locking bolt that provides a robust locking mechanism.