The Sissy Stud concrete screw is an anchor made of carbon steel. The anchor is made in sizes 7.5, 10.5. 12.5 and 16.5, and is screwed into a predrilled cylindrical drill hole. The special thread of the anchor cuts an internal thread into the member while setting. The anchorage is characterised by mechanical interlock in the special thread.

The Sissy Stud concrete screw in the range from 7.5 to 16.5 correspond to the pictures and provisions given in annexes A and B. The characteristic material values, dimensions and tolerances of the anchors not indicated in annexes A and B shall correspond to the respective values laid down in the technical documentations of this European Technical Assessment.