This is a set of two auxiliary locks to prevent intrusion through windows. They are easy to install without tools and are useful for home security. They can be used on both the upper and lower frames and are compatible with sashes and window frames approximately 28-42mm thick. Although unused, please understand that these items have been stored at home. [Product Name] Window Auxiliary Lock [Quantity] 2 [Color] Black, Silver [Installation Dimensions] Approximately 28-42mm [Use] Window security * We do not accept claims or returns. * This item is also listed on other sites and will be sold on a first-come, first-served basis.