The fischer safety screw with hexagonal head is produced from high-quality stainless steel. The screw geometry is precisely matched for the fischer frame fixings SXR, SXRL, DuoXpand and aircrete anchor GB. When driving in the screw, the plastic sleeve of the anchor presses against the drill hole wall and expands in the building material. The anchor is, together with the safety screw made of stainless steel, ideal for external use.