This is a set of 6 auxiliary locks for crime prevention and preventing children from falling. I purchased these to prevent my child from falling, but they didn't fit my home due to a sizing error, so I'm selling them. The One-Touch Shimari locks are for windows with a gap of 4mm to 1cm, and the set of 4 (white with gray) can be used for gaps of 1cm or less. One of the One-Touch Shimari locks has a slightly damaged package, as shown in photo 5. (The contents are completely undamaged.) Purchased on Rakuten Ichiba for a total of 3640 yen.