Klein Tools has introduced its Heavy-Duty Nut Drivers, designed with a completely hollow handle for use on unlimited bolt lengths.

The nut drivers have magnetic tips to help retain the nut while driving, and a wrench assist feature for additional torque. The tool's heavy-duty shaft features Klein's Cushion-Grip handle, and each nut driver end is color coded for easy identification.

“These nut drivers are designed for flexibility, with the hollow-through shaft,” said Klein Tools senior product manager Raul Rosales. “Each nut driver is formed from a single piece of cold-formed steel resulting in a solid piece of metal that can withstand a great amount of torque.”

The Heavy-Duty Nut Drivers are available in six individual sizes (1/4”, 5/16”, 3/8”, 7/16” ½” and 9/16”), and 4-piece and 6-piece nut driver sets.