The Metric System The metric system is being used in many ways, in the United States of America. Many American cars are made using metric bolts, nuts, and measurements, Therefore many large companies like Snap-on, Craftsman, and Goodwrench are making their tools in metric units. These companies use the metric system because it is important that the measurements are accurate and easily communicated to other people. The reason the metric system is used in making cars is that it is much easier to remember because the whole system is based on a scale of numbers without fractions. Without fractions the numbers are much ea