Boring bars are specialized tools used in machining to create internal cylindrical surfaces. They consist of a long, slender bar with a cutting tool attached at one end, allowing for precise cutting inside holes or tubes. This makes them essential for tasks like enlarging or finishing holes in metal or other materials. These tools come in various sizes and designs, often featuring adjustable cutting tips to accommodate different diameters. Boring bars are commonly used in industries such as automotive and aerospace, where accuracy and smooth finishes are crucial for components like engine cylinders and aircraft parts.