This easy to install door restrictor has a ring which fits over the door handle making it ideal for use in UPVC applications as the door does not need to be drilled. All you need to do is fit the unit onto the wall close to the door and the chain will link around the handle.FeaturesWall mounted keep with extra long screwsProtects against burglary and theftDoor chain with locking ring for handleMade from die-cast zincSuitable for almost any style of doorNo drilling of door required