The perfect brush for dabbing concealer exactly where you need it, the Daniel Sandler Concealer Brush mimics the shape of your little finger to gently disguise under-eye dark circles when used with concealer. Incredibly efficient, the Daniel Sandler Concealer Brush, made from taklon (a revolutionary synthetic nylon),has smooth bristles that will let you load the brush effortlessly to allow full, concentrated coverage that blends into skin flawlessly. Measurements.