MasonMate Eye Bolt Shield Anchors for use in most types of masonry or concrete. Zinc plated for increased durability.These MasonMate Eye Bolt Shield Anchors have the following specifications: Size: M6.Anchor Hole Size: 12mm.Eye Hole Width: 10mm.Shield Length: 45mm.Thread Diameter: 6mm.Min. Hole Depth: 50mm.Qty. Per Box: 50.PTDMAMSAEM6