This painting depicts a nail - one of the most common building tools. The nail has a conical shape with a rounded top and a tip designed to be hammered into various materials such as wood, plastic or metal. Its main function is to connect different parts of the structure, for example, when assembling furniture or during construction. Nails come in different sizes and shapes, making them versatile to use. This simple yet indispensable tool is often found in household and construction.