Reamers are precision tools used to enlarge and finish holes to exact dimensions and smooth finishes. These tools are essential in various industries, including manufacturing, construction, and automotive repair. Reamers are typically used after a hole has been drilled to achieve a precise diameter and improve surface finish. They come in different types, such as hand reamers, machine reamers, and adjustable reamers, each designed for specific applications. Hand reamers are used manually, while machine reamers are used with machine tools like lathes and drill presses. Adjustable reamers allow for slight variations in hole size, making them versatile for different tasks.