Self tapping screws are machine equipment that is very apt for the maintenance work of different places. They are great items for the purpose of working when there are two types of different working material involved. They help in fastening surfaces together. These available pan head screws come in different sizes. They are either found to be blunt headed, flat head surface, sharp tip or piercing end tip. These screws that are sharp-tipped screws have the capability to drill down the hole into the surface all by itself if the materials that are used belong to the category of soft substances of wood or plastic.