This Klein Tools 7/16-Inch Nut Driver Features An Exclusive Hollow Shaft Design With A Rare-Earth Magnetic Tip For Unobstructed Pass Through, Even On Long Bolts. It Also Comes With Klein'S Patented Tip-Ident, A Color Coded Marking On The Handle End to Help Quickly Identify The Nut Driver Orientation and Size. Additionally, A Cushion-Grip™ Handle Allows For Greater Torque and Comfort.