Automatic Driver (Battery-Free) - Set of 10 Easily tighten or loosen screws simply by pressing the driver onto them! Insert a bit, place it on the screw, and press to rotate the bit, tightening or loosening the screw. You can use it in a wide range of situations by changing the included bits. It's very useful to have one. 【One-Touch Detachable Holder】Easily swap bits with one touch to match the screw and application. Simply push in or pull out for easy attachment and detachment, securely holding the bit without dropping it. 【Set Contents】Main unit x 1, Drill bit x 1, Phillips head screwdriver bits x 2 (PH1 x 1, PH2 x 1), Flathead screwdriver bits x 2 (-3.5 x 1, -6.0 x 1) 【Specifications】 External dimensions of main unit: Approximately W3.5 x D3.5 x H22.5cm Weight: Approximately 129g Materials: Alloy steel, PP I have multiple similar products.