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. 646-3/16M- 646-1/4M- 646-5/16M- 646-11/32M- 646-3/8M- 646-7/16M- 646-1/2M. *3/16" does not have hollow shaft.