HIGH QUALITY: 42 different kind of bits made of chrome-vanadium steel are carefully selected to meet all your need. 45-IN-1 TOOL KIT: Professional 45-in-1 multifunction interchangeable precise manual tool set, including a tweezer, a handle, and extension bar and 42 screwdriver bits. Light weight and compact design. PRECISION ELECTRONIC INSTRUMENTATION DEDICATED: Even ultra-small 1.0 frame can be dismantled. Come with 42pcs multi size bits to fit almost phone in the market. Perfect for repairing laptops, mobile devices and other precision items like wristwatches and eyeglasses.