Abstract: A protrusion anchor assembly is provided that utilizes a plurality of extendable pins to secure the anchor body within a bore in any hard material, such as concrete. The anchor body is rotated within the bore while the pins are simultaneously and gradually extended, carving out a groove or grooves within which the pins can sit. After installation, the device is secured within the bore by tightening a jamb nut against the surface of the concrete wall and in some embodiments placing a security plug within the anchor body to ensure that the pins are held in place. The pins prevent the anchor from being withdrawn because they act as protuberances that catch against the edges of the groove and cannot be drawn past that point.

Abstract: A protrusion anchor assembly is provided that utilizes a plurality of extendable pins to secure the anchor body within a bore in any hard material, such as concrete. The anchor body is rotated within the bore while the pins are simultaneously and gradually extended, carving out a groove or grooves within which the pins can sit. After installation, the device is secured within the bore by tightening a jamb nut against the surface of the concrete wall and in some embodiments placing a security plug within the anchor body to ensure that the pins are held in place. The pins prevent the anchor from being withdrawn because they act as protuberances that catch against the edges of the groove and cannot be drawn past that point.