This UHPPOTE 600lbs Holding Force Mortise Mount Electric Magnetic Lock is perfect for sliding doors. It has a NC mode (locked while supplied with power) and a fail safe mode. It also has a built-in voltage spike suppressor for added safety. Made of stainless steel, it is easy to install and has a holding force of about 280kg/600lbs. This electric magnetic lock is a great choice for any sliding door and provides reliable security.