Boring bar runout presetter -Length extened type
                      
                      1. Inspection precision up to μ grade; 
2. Easy operation and minimize manual operation error; 
3. Adjustable gauge stand to achieve different position measurement; 
4. Double measuring chip can realize fast and accurate measurement in axial direction of different diameters multi-step tools;
5. It can adjust the spring strength according to different weight and sensitivity of the tools;
6. Replaceable alloy center suitable for different shank types; 
7. The presetter can be customized.