This tool is mainly used in the experiments to explain the first law in physics . The instrument is composed of a base, a column, an aluminum ring, etc . When using the tool, be careful not to hit it and keep it in a cool, dry place . Also suitable tools for school teaching, learning and display collectibles, will be an important complement of laboratory materials. incredible support tool that can be used in laboratory equipment for physical or lab decoration for enhancing the effectiveness of learning physics experiments .