Material AISI1010,AISI1015,AISI1045,AISI1085 Features: 1.Size: 1.0mm-50.8mm 2.Grade: G100-G1000 3.Hardness: HRC50-55. 4.General Application: Bearings,Automotive,Castors,Locks,Drawer Slides,Welding,Capabilities decorative,bicycle parts,light-dutyhardware,toy and etc.