mavala emery boards carded 8 pcs how to use: use the thinner side with long and supple movements stroking from the edges to the centre to give your nails the shape you wish. to keep nails strong avoid filing deep into the sides of the nail tip. to finish the work eliminate any asperity by filing with small vertical strokes from the top to the bottom and vice versa (bevelling) with the tip of the board. it also allows the nail layers to be sealed again.