For the staircase I have two safety gates ordered with additional extensions. Delivery as always top. Price for the extensions is but in my opinion much too expensive! Installation was very easy. Inserted extensions and then screwed to the wall and the stairs. When unpacking, I had initially feared that the grid was supplied defective because the closing mechanism nihct worked and the two corner pieces are not parallel (read: everything seems a little crooked). When installing but it turns out that the pressure against the walls of the correct gap width can be adjusted. Means that the grating is constantly under tension and does not slip even with the door open. I think that's really great - not every grid. Would I buy it again - Safety first - even if the extension is very expensive.