It is one kind of stockless anchor, similar to Union anchor. If you want to know more, we, Ekaship Hardware Ltd feel pleasure to share what we know. We have dimensions of both above anchors. The below anchor is also available, even though not often used: Klip anchor, Offdrill II anchor, Sandig III anchor, Temco anchor, Ansaldo Anchor, Heuss Anchor, Hook Anchor, Stokes Anchor
