Aerosmith’s Calk-in Anchors are heavy duty mechanical anchors with internally threaded parts whose sleeves are made of Zamac alloy. This anchor comes pre-assembled and can be used in concrete, brick, block and stone. Pre-drill the proper hole diameter and length, tap anchor into pre-drilled hole and properly set using the proper Aerosmith calk-in setting tool. Once properly set, put fixture in place and use the required machine bolt for proper attachment. This anchor can also be used in normal weight concrete, grout filled concrete, masonry (CMU) brick and stone. This anchor is not recommended for overhead applications.