YB-600C (LED) is an all-metal construction electric bolt.with European-type cylinder and has both electric control and manual control functions and special latch bolt Design.The special design of all-metal linkage parts results it can bear with the temperature of 60 ℃ or -40 ℃ below zero .Special adopts 304 stainless steel Bolt by CNC lathe, can withstand 2000kg holding force.