Internal flanges inside handle provide solid, twist-resistant blade anchor. The Klein 602-7DD is a 7-inch demolition screwdriver with 5/16-inch tip size. This demolition driver saves your other tools from the abuse these screwdrivers are designed to take. A plated metal strike cap protects the handle from hammer blows. The unique screwdriver design transfers impact force directly to the work surface. It has been engineered, manufactured and tested for prying and chiseling. The cushion grip handle allows for greater torque and comfort while the internal flanges inside the handle provide solid, twist-resistant blade anchor. Since 1857, Klein Tools has manufactured the world's finest hand tools. Today, Klein Tools is the No. 1 choice among professional tradesmen. Klein Tools' dedication to quality and innovation continues with products available for professional tradesmen worldwide.