The Fischer 77851-69 Universal Fixing Handi-Pack Ux6x35R With Rim Pk 20 is an excellent, high quality product. This is a powerful and universal product which is used for cavity space fixing. This product works by expanding by spring force into any cavity. It has been specifically designed for small cavity depths and is fully zinc plated and yellow chromed for good corrosion protection. The long threaded rods will allow large wall thicknesses to be bridged. It is TUV certified. This product is suitable for pre-stressed hollow-core concrete slabs, gypsum plasterboard and gypsum fibreboards, chipboards and slabs made of perforated bricks, hollow concrete blocks and more. This product can be used to fix pictures, lamps, electric switches, key boxes, small wall-mounted shelves, towel rails, lightweight mirror cabinets, curtain rails, cable and pipe clips and cable trays.