Stainless Steel Anchor is designed to be used in solid concrete. They should never be used in porous, hollow materials, such as brick or CMU block. It is manufactured from different types of materials and coatings for installation in a range of environments. The Stainless Steel Anchor has the most consistent holding values in solid concrete of all other types of expansion anchors. The expansion clip is permanently attached to the anchor and is made from the same grade of material.