... eco-friendly 3. size:12.7*83mm 4. DIN JIS output shaft Specifications:1) Suitable for various automotive, electronic, telecommunications, ... EDM, etc. 3)Quality control equipments: roundness meter, projector meter, microscope, gear-test meter, surface measuring meter and so on4) Precision/tolerance:0.0001mm5 ... Iron, Copper and Aluminum, and so on, with an output of over 1 million pieces per month ...