The design of the Artis Elite Collection Linear 1 has a solid metal handle and is produced using a proprietary premium metal alloy that has a luxurious density, increased durability, and feels even smoother to the touch. Offering the thinnest width fibre bundle of the Linear brushes, the Linear 1 creates a line shape about 2mm wide, which makes it excellent for creating tight lines around the eye and filling in the eyebrows. The Linear 1 brush is designed to be used with liquid, cream or powder products such as: Lip color Eyeshadow Eyebrow color Eye liner Skincare products The Elite Collection handles use paired elliptical/oval shapes with an oval fibre bundle that mimics areas and shapes of the face. The double oval design and unique bundle orientation is exclusively patented by Artis, and CosmeFibre® is trademarked. As we are currently transitioning to more sustainable packaging, your item may include packaging alternatives to help decrease our carbon footprint. "This super-skinny, dense brush is multipurpose; use it to brush out brows, draw on winged liner, or blend out eye shadow."   -Harper's Bazaar, [as one of their 11 Best Eyebrow Brushes list 8-26-22.]