3M™ Protecta® Concrete D-ring Anchor with bolt- 5.7"x5.7"x4.4"- 2190055 - 1/CS3M Protecta Concrete D ring Anchor for 11 16 in, 18 mm or 3 4 in hole with swiveling D ring Our anchorage connectors are built from top quality materials providing high strength and durability to stand up to the toughest environments. Anchorage connectors are the unsung heroes of most fall protection systems, often overlooked but critical components because they securely attach your system to the anchorage. Your choice of anchor depends on the type of