MX-500SEA, Sturdiness Electronic Bolt Lock, including Fail-safe and fail secure 2 types. Built individually controlled solenoid valve, High security locks suit for framed glass doors, wooden doors, metal doors, fire doors. Lock body are made of 304ss high hardness, corrosion resistant stainless steel, all solid lock withstand 4500 pounds linear positive impact, Special photoelectric control ultra-low temperature, low efficacy, Safe and reliable energy saving. Attached accessories for frameless glass door and narrow panel door.