Developed for professionals who repair devices with precision and standard screws - Precision screws with special head types are often used in small devices. Precision screwdriver bits come in handy when you need to repair a smartphone, laptop or small kitchen appliances. This comprehensive precision screwdriver bit set contains all the bits you need for precision and standard screwdriving work. 20 precision bits, 20 standard bits and two magnetic handles to hold the bits securely: The Precision screwdriver bit set offers bits for most screws, including precision screwdriver bits with special head types. All head types are colour-coded to make it easier for you to select the bit you need. The set is stored in a robust pick and click case with transparent lid. Impact-resistant 1/4 inch hexagonal shank for use with impact wrenches and drill drivers.