Standard Diameter: 1″ / 1.00 InchesMetric Diameter: 25.4mmGrade: 500Material: AISI 1015 Carbon SteelBall Weight (each): 2.3617 Ounces / 66.953 GramsCarbon steel balls are used in automotive applications, for semi-precision bearings, and in commercial applications such as casters, locks, and drawer slides. Other applications for carbon steel balls include locks, bicycles, roller skates, slides, trolleys and conveyors.