This is No. 1 because socket wrenches and short bit set objects can not reach screws in deep holes. Most of Bosch's electric tools are anti-tampering Torx screws, so they are useful during disassembly cleaning and maintenance. If you buy cheap ones, Torx Driver with thin holes may break the tip, so it will be tough to break the tip with the screws stuck, so you can only use something that is slightly expensive. Also, I can not trust anything that is sold as a large number of hexagon bit set even by the famous high-end tool maker recently. The things of the company are not good in Asian products sold at b, and those of m company can not be distinguished from each other in the first place, so it is useless in the first place, anything other than the thick size can be used, the thin size can not be used. In my experience, if there are multiple lineups of Japanese firms such as American manufacturers of Bessel or Bessel, only the higher one will not use only this perforated Torx.