YB-80 is an all-metal construction electric bolt with European-type cylinder latch lock, which is manufactured by 304 type of stainless steel with special design. The linkage, manufactured by lathe, can withstand 300kg holding force. The special design of all-metal linkage parts results it can bear with the temperature of 60 ℃ or -40 ℃ below zero, it Bolt Lock pass through security test after it has been used for over 1 million times