PREVENTION - The keep is adjustable to stop the door from rattling . box fits behind the keep wood chippings getting into the lock. Strong & Durable prevents the latch bending due to over tightened screws. Thick antirust chain materials are processed, Ideal for front doors, apartment doors, hotel rooms, and even sliding glass patio doors, additional security for your home or office doors are within reach! All installation hardwares are included in the package,so you can mount it easily. Good anti-theft, Made of high quality stainless steel, this security lock is durable and will not rust. Thicker plate and chain make it stronger and more stable, Manufacturer: KRXSOBNV