9. Eyeliner Brush
The eyeliner brush is a versatile tool. You can use it to blend pencil liner into the lashes for a more dramatic look. You can also use it damp to line your eyes with powder eyeshadow for a much softer look than when you use a regular eyeliner.
In a pinch, you can use the eyeliner brush for applying shadow into the crease with more precision. Look for a brush with synthetic bristle to keep those lines precise. It should be very firm and the tip should be cut to a squared angle.