For buffing, the abrasive is located in a semisoft binder. The abrasive may be used dry or submerged in oil, water, or other carrier/lubricant for polishing purposes. Both buffing and polishing are capable of producing surfaces of high reflectivity due to a smearing of surface layers but not with greater smoothness. Burnishing more quickly provides the same result, especially for holes. Furthermore, when the burnishing roll penetrates to some depth, it produces a more favorable residual stress pattern. Burnishing is therefore preferred for applications where fatigue resistance is important.