What feature of a sander allows the operator to hold the workpiece with both hands while sanding?

The feature that enables an operator to hold the workpiece with both hands while sanding is the work table. A work table provides a stable surface for securing the workpiece, allowing the operator to maintain control and apply even pressure during sanding. This stability is crucial for achieving a smooth finish and ensuring safety, as it prevents the material from slipping or moving unexpectedly while being sanded.

Grip pads primarily facilitate the operator's grip on the sander itself rather than securing the workpiece. The support beam is usually involved in providing additional stability in certain tools or machines but does not specifically enable the use of both hands for holding the workpiece. The protective casing is designed for safety, preventing debris from flying and protecting the operator from potential injuries but does not contribute to the handling of the workpiece itself.