The doorstop is nice and flat, so that the risk of tripping is reduced and served its purpose. I wanted to replace an existing doorstop because my stainless steel housing has fallen. When mounting accessories, among others, an appropriate pan head screw and a dowel 8 was there. The screw securing the stopper and but also keeps the stainless steel cladding on the rubber inner workings. For an 8 dowels you really have to drill a hole belonging, but I did not want so. The old stopper was drilled and fastened with a 6 dowels in the joint between two floor slabs and so had done his job. I had no desire to drill this existing hole for a dowel 8 with the risk that I jump at the plate edges parts. To use other screws for a kleinerene anchor is problematic, since the supplied screw keeps the stainless steel cladding and the lens head is correspondingly large. Is therefore greater, appropriately designed large as the normal standard screws and also the inner workings of the stopper that they would flunk or not maintain the housing. I have it but then somehow managed to fix the stopper together with the cover without drilling the giant hole but only because we have equipment such as a small workshop at home. So that part of the job done, but is only suitable for people in rented accommodation or with wooden floors. It is better to resort to a stopper that can be with various screws, depending on the substrate, fix and cover attachment then.