Fischer SX Plus Taco - Measurement: " 4 x 20 mm. -Optimum force transmission due to four-way expansion. -This allows high clamping values on solid and hollow construction materials. -Easy to Mount: The edge of the socket prevents it from sliding deeper into the drill hole. -No expansion pressure on the plug neck. This means no damage to tiles or plaster. -Article known as universal anchoring plugs, concrete plugs, plasterboard plugs, brick plugs, cement block plugs, universal fixing plugs, wall plugs.