Material: Stainless Steel Product Name: Door Chain High quality stainless steel is hand brushed to ensure rust resistance and long life. Product Information: Door Chain Protector stainless steel security sliding door chain choose 304 stainless steel stamping, have quality smooth surface, corrosion resistance, prevent birth rust; anti-theft chain door latches can be used for a variety of door types and can be placed above or beside the door panel. It has a 5 inch long, 8 inch welded steel chain and all necessary fittings for a complete installation Usage: door chain lock for hinged doors, open access for safe viewing . This latch with chain allows you to partially open the door to identify visitors or receive packages. EASY TO INSTALL: Chain Door Guard can be used for wood or metal doors on a variety of door types . It can be placed above or beside the door panel. This latch is very easy to install and strong. With four mounting screws provided, no additional screws are required.