The S-Fix Plus / Slim Fix in the range of M6, M8, M10, M12, M14, M16 and M20 is an anchor made of galvanised steel. The S-Fix Plus A2 and S-Fix Plus A4 in the range of M6, M8, M10, M12, M16 and M20 are anchors made of stainless steel of grades A2 and A4 respectively. The anchor is installed into a predrilled cylindrical hole and anchored by torque-controlled expansion. The anchorage is characterised by friction between expansion clip and concrete.