3M™ DBI-SALA® Confined Space HC (High Capacity) Core Insert Base is constructed of mild steel and is installed flush into the working surface. It’s designed to be inserted into a drilled core and is secured with adhesive. When used as part of our complete system, this base meets the requirements of EN795:2012, EN1496:2006, CEN/TS 16415:2013, and AS/NZS 5532.