Equipped with a lock, in a certain period of time can resist abnormal opening under certain conditions, with certain security protection and corresponding security level of the door.
The full name of the anti-theft door is "security door". It has both security and security features. According to the General Technical Conditions of the Security Door, qualified security doors can not be broken open or open a 615 square millimetre of openings on the door or a 38 square millimetre of openings in a semicircle of 150 square millimetres at the lock point within 15 minutes using general hand tools such as chisels, screwdriver, crowbar and hand drills. And the lock used on the door must be tested by the Ministry of Public Security testing center qualified with the anti-drilling function of the lock. Burglary door can be made with different materials, but only to meet the standards of testing, the safety protection product license can be called the door.
Chinese name security door class 4