Size - 17/64" Diameter Grade G3 Precision Balls||Material - Made of chrome steel with excellent surface quality, high hardness, high load capacity, and wear resistance.||Features - Wide range of applications(maintain industrial equipment or use for family DIY projects); Cost-effective(can repair existing products)||Applications - Maintain product that uses steel balls, such as ball bearings, turntable, drawer slides, casters, door locks; DIY projects like a keychain, or adding weight for your projects, etc.||Notice - Confirm the Ball Diameter before ordering.