Avoid expensive locksmith calls & never be locked out of home， office or car again Magnetic base grabs on to any ferrous metal (iron， steel) surface Rust-proof， tough & weather-resistant ABS case stays securely closed， protects key Easy to hide where only you can find it - under bumper， on frame or other metal object Made extra-large to accommodate modern multi-function keys， maximum 4-1/4"L x 1-3/4"W x 3/4"D 2 packs