|An externally threaded hardened screw with a double lead, consisting of alternating raised and
lowered threads with notches cut into the raised threads, and a diamond-shaped nail-type point.
They have an advantage over many other types of masonry anchors in that they can be installed
close to the edge of the material in which they are installed.
|Other variations may be available in
Steel, Stainless, White Painted Heads