For example,if you have one brush (or your finger) for applying 2 colors and eyeliner to your eye on will end up with the colornot blended correctly and no clear distinction between colors; also if you use the brush to apply a dark eyeshadow then next time you want to use it to apply your base/light color it will still have remains of previous dark color which then causes a dirty look.
The same goes for your powder brush if you use it to apply your powder then your bronzer/blusher then next time you want to use it for powder it will still have remains of the bronzer/blusher.
As a Chinese makeup brush supplier who has been in this industry for more than 10 years, Toney supplies various makeup brush set per customer requirements.
And remember that buying makeup brush set will save some money comparing with buy individual brushes. Please contact us if you have any demand.