Uniform Size: Fine grinding to ensure that each steel ball is uniform in size(1/4inch, 6.35mm) High Performance: Stainless steel, superior anti-corrosion performance, strong hardness and higher wear resistance Precision: The product has high precision and small tolerance, suitable for many occasions and different precision requirements Wide Range of Uses: Precision bearings, instruments, meters, pen-making, fishing gear, finishing and other high-end industries High Quality: The steel ball is made of 440C stainless steel, which can effectively prevent the ball from being rusted due to moisture or water, and improve the service life of the product