Full hollow shaft design with Rare Earth magnetic tip. Full hollow shafts facilitate work on long bolt applications.* Cushion Grip handles allow for greater torque and comfort. Handle domes are color coded for easy identification. Internal flanges provide solid- twist-resistant shaft anchor. Chrome plated shaft helps prevent corrosion. Set contains Cat. No: 630-3/16M- 630-1/4M- 630-5/16M- 630-11/32M- 630-3/8M- 630-7/16M- 630-1/2M. *3/16" does not have hollow shaft.