The Capri Tools Kontour Screwdrivers are forged from Chrome Molybdenum steel, the professionals' choice steel. It provides the high tensile strength demanded by the professionals. Nonmagnetic black phosphate coated tips provide excellent gripping power and give you easier and more secure turns. The Kontour handle is shaped to fit the curvature of your hand, giving you a powerful and ultra-comfortable grip. The Kontour handle has a hybrid grip covered in alternating soft and hard layers, in a pattern designed to strike the perfect balance between high speed turning and high torque transfer. The hybrid grip gives you a sure grip while lets you quickly shift in between turns. Anti-roll design makes sure the screwdriver stays where you leave it and won't roll away. Hanging hole at the top of the handle lets you use standard hooks for organization and storage. Slotted 1/4 in. x 4 in. long shaft.