The WallGripper™ is the only expandable screw-in anchor on the market. It expands and grips behind drywall and is twice as strong as a regular screw-in anchor. It is patent designed to offer the ultimate holding power without any pre-drilling: A unique body design with 4 expandable wings grips tightly behind drywall to offer the ultimate holding power. A fine centered point that helps guide the anchor into the wall with flawless precision. A sharp cutting edge that reduces the force required to cut the material. A sharp profile thread cuts deeply into the hole to ensure ultimate holding power and stability.