For the precision lining of the eye area or body detailing/design. This brush has smooth, synthetic fibers of just the right length and density for lining the eyes. MAC professional brushes are hand-sculpted and assembled using the finest quality materials. They feature wood handles and nickel-plated brass ferrules. MAC is working toward a cruelty-free world. MAC does not test on animals and never asks others to test on the brand. MAC advocates for ending animal testing globally and is taking steps toward that goal every day.