Royal 4-Step Nail Buffer Block. The quick way to manicure and shine your nails. This handy buffer block files, smooths and shines in 4 easy steps for beautifully manicured nails. Instructions included. Step 1 - use the black side to file and shape you nails. Step 2 - use the purple side to smooth and even the surface of your nails. Step 3 - use the pink buffer to smooth the surface of your nails. Step 4 - use the white side to provide a glossy finish. RRP £1.95