The General Wall Plugs Brown are a set of plastic wall plugs that are designed for use in solid walls such as concrete, brick, and masonry. They are available in a size of 7mm x 40mm, and come in a pack of 100. The plugs are made from high-quality plastic that is both durable and weatherproof. They also feature locking lugs that prevent the plug from rotating in the drill hole when installing. This makes the plugs a very secure and reliable fixing. · · · Locking lugs prevent rotating in the drill hole · · Suitable for wood screws · · Suitable for all concrete and masonry · · Material ?Wood, Plastic