features:Copper, tougher and practical.Simple and chic design is a good helper in life.Easy to install and maintain.Safer than typical curler shutter lock cores.Internal and external can be locked and unlocked.Product Name: Roller Shutter Door LockMaterial: CopperDimensions: 280 * 55mm(11.02 * 2.17in), 280 * 39mm(11.02 * 1.54in)Style: Cross style, one character style, moon styleInstallation: Installed in the middle/bottom of the rolling shutter door Package includes:1 x Roller Shutter Lock(including accessories)