Metal rolling machines feed metal sheets, plates, bars, or tubes between rollers or rotating dies to create curves, rolls, beads, or other profile shapes. Slip and plate rolling machines use their long, cylindrical rollers to form sheet metal or metal plates into rolls. Bar and tube rollers use their compact rollers to form straight bar and tube stock into rolls. Bead rollers pass sheet metal between two rolling dies to add ridges, steps, and other profile shapes that strengthen the sheet.