This Stalwart 25 piece Precision tool set features the right assortment of tools and bits for electronics, cell phones, laptop build and repair as well as UAV, Drone and Quad-Copter work! This compact and portable set is not meant to provide a full range of sizes and bit types but is intended to give you enough variety to do the job When access is limited or you don't have the ability to carry a full set of repair tools. Having a range of 20 precision bits gives you the ability to handle most anything. With the small size pliers and cutters you can make careful repairs in small areas. The extendable tool handle and the long tweezers both provide that extra reach and length necessary for so many precision jobs! All screwdriver bits are chrome vanadium for resisting corrosion, rust and ensuring long life. All pieces are stored in a durable non-skid backing case for easy storage and travel.