Description:-These steel bearing balls are great for applications were there will be extreme rotation and a premium performance bearing ball is required to meet the demands.-These high precision ball bearings are hot forged from bar stock with precisely controlled atmospheres and temperatures to assure uniform rigidity and microstructure for each piece.-The steel balls come lightly lubricated to keep their perfect polish.-Carbon steel balls are used for semi-precision bearings, and in commercial applications such as casters, locks, and drawer slides.-Other applications for carbon steel balls include casters, drawer slides, door locks. Suitable for a range of purposes, some of the most common are listed below:-1/8" is often used for clusters-1/4" is often used for rear wheels and bottom brackets-3/16" is often used for front wheelsSpecification:Size: 10mmMaterial: Carbon Steel (Q235)Package Content: 50 Piece