Designed for professionals who repair devices with precision and standard screws Quality Screwdriver Bits for Precision and Standard Head Types Whether you're a professional fixer or a do-it-yourself fixer, this Precision Bit Set has what you need to disassemble, repair, and reassemble any smartphone, game console (Xbox / PS4), laptop, desktop, tablet, small appliances, and much more! Features Quality screwdriver bits for precision and standard heads Useful for professionals who repair devices with precision screws. Includes 20 Precision SD Bits 28mm PH, SL, Star, U, T, TH, Hex, Y, Triangle 20 Insert SD Bits 25mm PH, Hex, SL, TH, PZ, U, Y Precision Bit Handle Standard Bit Handle