38-in-1 Aluminum Alloy Screwdriver Set Multiple Using Several ChoiceAluminum Alloy Handle: L94mm Magnetic Extension Bar; L 60mm Screw Bits Dimension: L 28mm Screw Bits Dimension ( 4x28mm) Aluminum alloy handle, magnetic extension bar, 36 screw bits. Ergonomic handle, rotating cap design, easy and flexible for operations. The front end of the handle with magnetical design can hold the bits and magnetize the screws. Chrome vanadium steel forging and heat treatment, the screw bits are durable. Fully automatic flip cover, you can open and stand this unit on your desk by pressing the button on the box.