Tekton Hex High-Torque Black Oxide Screwdrivers have tips that are at least twice the depth of the corresponding socket head cap screws for full engagement. 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.