Depending on the burnishing task various numbers of hardened rollers are arranged in a cage. The machining times are kept short by using several rollers simultaneously. During roller burnishing with multi-roller tools, a roll-off process with kinematics similar to those of a planetary gear results. A taper supports the rollers and provides the contact force for forming the material. The rolling diameter is adjusted by axial shifting of the taper relative to the roller. Therefore multi-roller burnishing tools are particularly suitable for small and filigree workpieces. ADVANTAGES - Workpiece is not subjected to lateral forces - Reduced machining times - Harder surface layers - Increase in fatigue strength - Greater contact area due to plateau formation - Higher surface resistance to wear and corrosion - Increase in material fatigue limits - Reduced sliding friction coefficients, constant dimensions and high fitting accuracy - Environmental sustainability (as no grinding dust is produced) - Suitable for use on all standard machine tools