XTM-500B(LED) is an all-metal construction electric bolt .with 1000kg holding force. The bolt is made of 304 stainless steel solid bar by CNC lathe and with anti-burglar design to meet the standard of special security requirements. The security type of this Bolt is Unlocked when energized.It can be worked in the temperature of 60 ? or -40 ? below zero based on the all-metal linkage parts. With the multiple designs of durable magnetic valve, special photoelectric control system, ultra-low temperature and power consumption design, anti-prizing† and smart circuit.