Usage Tips:Material: Stainless steel. Product name: Door chain. The high-quality stainless steel is hand-brushed to ensure rust resistance and durability. Product Info:The stainless steel safety slide latch door chain guard choose 304 stainless steel stamping form material, have qualitative feel surface smooth, corrosion resistance, prevent birth rust The Anti Theft Chain Door Latches can be used on a variety of door types and can be placed over or next to the door panel. Use: Door chain lock for revolving doors, opens access for a safe view. This chain latch allows you to partially open the door to identify visitors or receive packages. Easy to install: Chain Door Guard can be used on wooden or metal doors on a variety of door types. It can be placed above or next to the door panel. This latch is very easy to install and solid. Note: The data are all measured manually. Please allow an error of 1-3cm. Due to the difference between light and display, there is a certain color difference, which depends on the actual object receivedNote: Data are all measured manually, please allow for an error of 1-3cm. Due to differences in light and display, there may be a certain color difference, which is subject to the actual object received.