As the bolt is tightened, the cone draws up through a slotted sleeve and expands against the interior of the drilled hole with great force.
Requires no caulking and is excellent for heavy holding of problem material such as cement, cinder blocks, hollow tile and other concrete mixes.
Requires a large hole. Use a power drill and masonry bit.
Use short lengths in good-grade concrete or where thickness limits the length. Use long lengths in poorer-grade concrete where extra anchorage is required.