This double sided set has four brush heads condensed onto two handles, freeing up space in your makeup bag and making new eye looks a breeze! Shade Define Brush: Apply shadow all over the lid with the shading brush then flip it over and use the defining brush to add depth to the eyes. Blend Smudge Brush: Blend shadow to eliminate harsh lines with the blending brush, and use the smudge brush to create soft definition along the lash line.