The Havahart X-Small Professional Style 1-Door Animal Trap has a patented design that assures you of quick. safe catches and releases. This trap is ideal for trapping chipmunks, squirrels, flying squirrels, voles, weasels and rats. This trap's structure helps prevent injuries to you or the animal. This patented Havahart one door cage trap is constructed of sturdy rust-resistant wire mesh with steel reinforcements for long life and galvanized for maximum resistance to rust and corrosion. Mesh openings are smaller than competing traps of comparable size to prevent escapes and stolen bait. Its patented design consists of a gravity action door and sensitive trigger to ensure quick, secure captures that target the specific animal size, eliminating undesired catches. Solid door and handle guard protect the user during transportation, while smoothed internal edges protect and prevent injuries to animals.