Security on double glazed and composite doors, comes down to the euro cylinder and handles that are fitted. There are 4 main security level, contractor, 1star, 3 star and 3 star diamond or elite. It is recommended that a minimum of 1 star secured by design rated cylinder locks are fitted. These comply with BS EN 1303 TS007. Which have many security features like anti pick, anti bump and anti drill. Depending on the manufacture, more features will be available. Please get in touch for your security needs.