Turning the nut pulls the working end of the sleeve anchor up through the sleeve, expanding and anchoring itself securely in the concrete, brick or block. From the Manufacturer Concrete Sleeve Anchors’ design allows them to anchor into concrete, brick and block.

The Hillman Group 370823 Hex Head Sleeve Anchor, 1/4 X 1-3/8-Inch, 50-Pack. Condition is New. Shipped with USPS Ground Advantage.