I have always purchased a quality brand of blade for my Bosch multitool, often Bosch or Dewalt and ocassionally Fein or Makita but the price of these blades seemed expensive for grout removal, SMART Multi Cutter Mortar Buster Blade 32mm | Toolstation and Bosch 30 Carbide RIFF-Grit Tile & Grout Segmented Cutting Blade 85mm - Screwfix so I shopped around. I ended up buying some from Saxon blades and they were dire, one lasting for only a very short time and unable to complete the job. In fact I had a well used Bosch metal blade that cut better than these blades from Saxon so you only get what you pay for, and in comparison the Bosch at £26 would outlast far more of the Saxon blades.