Specification: Color: Sliver Material: Stainless Steel Base Size: 23*63mm, 23*123mm Chain Length: 185mm Package Included: 1 x Door Security Chain 4x Screws 1 x No Nail Glue Material: stainless steel.Product Name: Door ChainThe high-quality stainless steel is hand-brushed to ensure rust-free and long service life. Product info: Stainless steel security sliding latch door chain guard choose 304 stainless steel material punching form, 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 above or next to the door panel. Usage: Door chain lock for revolving doors, opens access for a secure view.This deadbolt 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 wooden or metal doors on a variety of door types.It can be placed above or next to the door panel.This lock is very easy to install and solid.With four included mounting screws, no additional screws are required.