Pair with large-diameter wood screws, often called lag screws, to secure heavy wood structures like beams and joists to block, brick, and concrete. As you tighten your screw, these anchors expand while their lobes grip the hole’s walls for a strong hold.

To install, tap the anchor into a drilled hole until it’s flush or slightly below the surface. Then, position your structure, insert a lag screw, and tighten. You can remove your lag screw to disassemble or adjust the structure. However, frequently removing the screw will weaken the strength. The anchor itself cannot be removed.