Real Techniques Bold Metals 101 Triangle Foundation Brush was uniquely designed with 3 different sides for a flawless coverage. This never-before-seen design will revolutionize your foundation application. The largest of the three sides is ideal to cover large areas of the face. Use the cross-hatching technique to blend the product into the skin for full coverage. The 2 angled sides can be used for full coverage under eye, and for blending seamlessly around the nose. The pointed tip is an added bonus for spot coverage. Since the brush has 3 sides you can use 3 colors, and still blend flawlessly.