Product features：This machine is mainly used for special clamps. It can grind the clamps of 1mm to 28mm. The clamps are completed at one time. It is not necessary to buy a lot of large and small elastic chucks to replace them because of the size of the grinding bit, and it is not necessary to spend a lot of time to find a suitable size of bobbin to clamp the bit! The symmetry of the left and right lip teeth of the drill bit, and the angle of the tip lip angle of the drill bit can be adjusted as required.