The Tekton 1/4 Inch Slotted High-Torque Black Oxide Screwdriver has a thick, slotted tip design that withstands high-torque driving. It's machined to the same width as the shaft to fit into narrow recesses. The handle's three-sided geometry directly engages the structure of your hand, instead of relying on friction with your skin, so you can apply high force with less fatigue. Round sections at the front and back ends of the handle allow you to spin long, finely threaded fasteners quickly and continuously. The overmolded grip provides a nonslip surface that is permanently bonded to the handle and won't degrade or become sticky over time. The polypropylene handle is reinforced with calcium carbonate for dimensional stability, making it resistant to extreme temperatures, gases, fuels, oils, grease, cleaners, and solvents. We use a molding process that forms the handle around the blade, rather than forcing the blade into a premade handle; the result is a straighter blade that can't twist out.