- High quality security cylinder. - Ultra heavy duty, passed 100000 test cycles. - For high frequency of use such as for public doors in office buildings. - High resistance against rust and corrosion. - Standard key on both sides. - Master key system available - 25 Years Mechanical Warranty. - Designed according to European standards. Shell & Plug : Hardened brass for durable key-way Pin : Brass. Hardened. 5 pins. Cam : High carbon steel, strong and durable. Key : Brass stndard-key, nickel plated. 5 keys included.