Multi-Magnetic Screwdriver Set: 110 in 1 Precision Screwdriver Set have more tools, Comes with all the necessary tools for a wide variety of jobs. Perfect for repairing laptops, mobile devices and other precision items like wristwatches and eyeglasses. Light weight and compact design High Quality and Well Perform: These durable screwdriver bits are made of CRV steel, whose hardness can reach to HRC52 56, guarantee for long time use.