Electric bolt lock for wood, glass, metal and fire doors: a stainless steel bolt drops into the frame and holds up to 800 kg (1,760 lb) of force. Fail-safe (opens when power is off), with a door status output, adjustable re-lock delay and a photoelectric sensor in place of mechanical switches, rated for 500,000 cycles. Brackets are available for frameless glass doors. Scroll down for details.