General description Designed for professionals who repair devices with precision and standard screws, the Bosch 42 PC Precision Screwdriver Bit Set is ideal for both professional and DIY fixers. This comprehensive set allows you to disassemble, repair, and reassemble a variety of devices including smartphones, game consoles (Xbox / PS4), laptops, desktops, tablets, and small appliances. Technical specifications Includes 20 Precision SD Bits (28mm) in various types: PH, SL, Star, U, T, TH, Hex, Y, Triangle Includes 20 Insert SD Bits (25mm) in various types: PH, Hex, SL, TH, PZ, U, Y Precision Bit Handle Standard Bit Handle