Smooth nail edges with Side 1 by filing in one direction, not back and forth. Gently glide Side 2 across your nail surface to smooth ridges. Use Side 3 to buff the nail surface to a matte finish. Add shine with Side 4. A few strokes across the nail surface results in a semi-gloss finish. More strokes provide a high gloss shine. Repeat sides 3 and 4 every one to two weeks.