1.Product Name & Structural Features Official Name: 3pcs Heavy Duty Shield Anchor. 3-segment split sleeve design. Tightening the bolt forces the segments to expand outward, locking tightly against the hole wall in concrete or masonry. 2.Material & Surface Treatment Main material: Carbon steel, electro-galvanized (yellow zinc plated) to provide corrosion protection. 3.Key Advantages & Application Scenarios High pull-out resistance and heavy load bearing capacity. Widely used to fix brackets, machinery and railings on solid concrete, brick and stone.