A steady rest is a support device used in turning operations to stabilize a workpiece during machining, preventing deflection and improving the precision of the cut. It is designed to hold the workpiece securely while allowing for rotational movement, providing support at critical points to ensure the workpiece does not move or vibrate during cutting. The primary advantage of a steady rest is that it helps maintain dimensional accuracy and prevents the workpiece from being deformed during machining. It is typically used for long, slender workpieces, such as shafts or bars, in industries such as automotive, aerospace, and metalworking. The steady rest can be adjusted to accommodate different workpiece sizes and is essential for ensuring high-quality, precise results in turning operations.