Indexes come with precision ground jobber length blanks ready for the cutter grinder! All HSS Blanks are heat treated to 62/65 Rc and marked with size. Drill Blanks are precision ground to -. 0002" or -. 005mm tolerance; Reamer Blanks are precision ground to +. 0002" or +. 005mm tolerance. When you need a set of custom cutting tools and you want to make them quick and cost effectively, use Vermont Gage Drill & Reamer Blank Sets. There is simply no easier, better, or quicker way to make quality cutting tools.