A tool holder is a device used to securely hold and support various tools, particularly in machining and manufacturing processes. It ensures that tools, such as drills or cutting bits, are properly aligned and stable during operation, which enhances precision and efficiency. Tool holders come in various shapes and sizes, designed to fit specific machines like lathes or milling machines. These holders can be made from materials like steel or aluminum and may feature different attachment mechanisms, such as collets or chucks. Proper selection and maintenance of a tool holder are essential for optimal performance and longevity of both the tool and the machine, contributing to overall productivity in industries like manufacturing and construction.