Upsize your Does It All Drill Bits set with the mighty 17mm drill bit for the big jobs. As with all Does It All Drill Bits, the 17mm bit features in the cobalt, titanium and tungsten carbide tip that can drill through the hardest materials and is suitable for a wide range of applications including wood, steel, masonry, tile, glass, plastic and brick. The tip is bonded to the shaft in a specialty process that means the 17mm bit will withstand extreme temperatures up to 700 degrees - for a sharp tip that lasts, and lasts and lasts!