Bio Sculpture Gold Buffing Block is a superior quality four sided buffer with durable grit (320 grit). It is a fine buffer used during nail preparation to remove excess oil from the nail plate. Perfect to buff out imperfections in gel application. Gentle enough to use on natural nails. Gold buffing blocks are excellent in bevelling the free edge of natural nails to smooth out peeling layers. Also available for purchase in packs of 12.