●When using, turn the holder to the right and pull out the core by 2-3mm. ●Replace the core after use. ●When replacing the core, pull out the cartridge (this product) from the holder and insert a new product. <How to set> ●Set it in the separately sold “MAQuillAGE eyebrow holder” and use it. ●Insert the cartridge (this product) into the hole in the above holder until it clicks. ●Tools can be set by removing the attached cap. <Effective usage> ●Leaf-shaped core with sharpened elliptical ends. By using the sharp part, you can draw a neat and thin line at the end of the eyebrow, and by using the wide part, you can draw a thick and soft line that blends naturally into the inner part of the eyebrow. By using properly according to the part to be drawn, you can create natural and beautiful eyebrows.