Installation method:First use 3/8 hammer drill to open the hole, and then directly use the wall anchor installation The anchor body is made of hardened carbon steel and 13 grade galvanized steel. 3/8*3 inch actual thickness 12mm One socket tool is included in each package. Easy to use. 10 Cement Wall Anchors per package Introducing the Wensilon 3/8" x 3" Concrete Screw, designed for anchoring to masonry, brick, or block. This product is equipped with a hardened carbon steel and 13-grade galvanized steel anchor body, ensuring durability and strength. The screw is fully threaded, with a thread size of 3/8" and a pitch of 24 threads per inch. The exterior finish is zinc-plated, providing added protection against corrosion. Each package includes 10 cement wall anchors, along with a socket tool for easy installation. Simply use a 3/8 hammer drill to open the hole, then insert the screw. The actual thickness of the screw is 12.1mm, and it is available in a pack of 10. The Wensilon Concrete Screw is perfect for a variety of construction and DIY projects, and its high-quality materials make it a reliable choice for any job.