A back-up pa supporting and releasably engaging an abrasive article. The back-up pad comprises: a body including a front surface and a back surface in which the front surface comprises a first attachment component thereon and the back surface comprises a second attachment component thereon, and each of the attachment components is adapted for releasable engagement with an abrasive article; a reinforcing plate located within the body between the front surface and the back surface; and tool securing means on the body for securing the back-up pad to a power tool and for selectively orienting the back-up pad in one of a first orientation and a second orientation. When the back-up pad is in the first orientation, substantially the entire front surface is exposed for contacting a workpiece, and when the back-up pad is in the second orientation, substantially the entire back surface is exposed for contacting a workpiece.