Intruder alarm device made from metal for windows, external doors and house doors comprises two sliding units made from round steel bars and a metal tube each having two flat steel bars on the ends

摘要

Intruder alarm device made from metal comprises two sliding units made from round steel bars (2) and a metal tube (1) each having two flat steel bars (4) on the ends. Metal pins (3) are provided on the outer sides and are sunk directly into the brickwork (7) by feeding the pins in pre-produced dowels or plastic tubes (5).