Laser micro-seam cutting, smooth edges, improved anti-smashing skills, security guard::It is made of multi-layer high-strength, high-hardness, and high-toughness alloy steel plate, which is sturdy and durable::Double unlock, after installing the battery, the password can be used, no battery is installed, and the key can be used::Password setting 3-8 digits password can be set freely to prevent the collision code; spare key set the spare key to prevent forgetting the password::Steel plate thickness: 2 mm solid steel plate::Product material: low carbon alloy steel