Description PREMIUM QUALITY: These insert nuts are made of high quality galvanized carbon steel material that provides strength and good corrosion resistance in many environments. EASY TO USE: They are multi-purpose threaded insert nuts that you can easily drive and use. Features: Insert nuts are superior to cylindrical and T-nuts because they can be installed from one side of the part. Note: The pre-drilled hole should be as deep as possible for the length of the embedded nut and the bolt can be screwed into any part of the workpiece through the nut end. Inset nuts provide threaded sockets for wood pieces, similar to wall anchors. These embedded nuts are inserted into a hole pre-drilled by the screw, in this case the outer protrusions bite into the wood, preventing the nut from turning or falling out. Features: Made of high-quality galvanized carbon steel, these insert nuts are durable and rust-resistant. The nut has an external thread and an internal hexagonal hole. They screw in with a hex wrench. Slotted nuts are preferred over cylindrical and T-shaped nuts because they can be installed from one side of the part. You can choose from different nut sizes and different size screws to suit your project. The pre-drilled hole should be as deep as the length of the embedded nut and any part of the bolt that can pass through the end of the nut.