INDRICO screws have deeper threads than regular screws, which prevents them from dislodging easily. They are made of steel and require a power screwdriver to drill them into the Material. In addition, Super Deals screws are often used along with plastic anchors that help distribute the weight of the hung object evenly over the surface.Super Deals Screws are very good for carpentry work. They are also used for fixing Plywood, Wood, Plastics, MDF, etc