Tool holders are devices used to securely hold and support tools, such as drills or cutting tools, during machining or manufacturing processes. They ensure that the tools remain stable and properly aligned, which is essential for achieving accurate and efficient results. Tool holders come in various types, including collet chucks, end mill holders, and tapered tool holders, each designed for specific applications. These holders are typically made from durable materials like steel or aluminum to withstand the forces generated during operation. Proper selection and maintenance of tool holders can significantly impact the performance and lifespan of the tools they support, making them a crucial component in industries like manufacturing and construction.