Collet is used to hold (1) work piece (2) tool (3) table (4) measuring instrument

A collet is a type of holding device used mainly in metalworking and woodworking industry. It forms a collar around an object and exerts a strong clamping force when tightened, securely holding the object in place.

Now, let's analyze each option and determine the correct use of a collet: (1) Workpiece: A collet can be used to hold a workpiece in place when performing operations such as drilling, milling, or turning. This ensures precision and stability during the process. (2) Tool: Collets can also be used to hold cutting tools, like drill bits or end mills, in place within the spindle of a machine tool. This allows for better accuracy and control while machining the workpiece. (3) Table: A collet is not specifically designed for holding tables. (4) Measuring instrument: While collets can theoretically hold measuring instruments, it is not their primary or most common function. There are other devices meant for holding measuring instruments more effectively.

Based on the analysis of each option, we can conclude that the primary use of a collet is to hold a workpiece or a tool. As we have two correct options here, it is important to clarify this nuance in your answer, resulting in: A collet is primarily used to hold (1) a workpiece and (2) a tool.