Due to the high expansion ability the CELO standard plug F achieves high pull out loads. The nylon plug is available in a wide range from diameter 4-20 mm. The standard plug F is ideally suitable for solid base materials, but achieves also good load values in perforated bricks and aerated concrete. Because of the very good screw guidance, the screw cannot move out of the plug during the screwing in. The distinct wings at the plug cause a good twist resistance in the drill hole. Further more the strong design prevents bending when hammered in. The plug consists of high quality and ageing resistant nylon.