I recommend a slim brow pencil that allows for precise application!

Colorgram Slim Brow Pencil! I find that the thin tip makes drawing easier! You can also draw precisely! Also, Colorgram products aren't slippery and draw really well! They sell it at Olive Young, and the price is affordable! It seems the name is slightly different now since it was renewed, but it still calls itself the Slim Brow Pencil! Once I started using the Slim Brow, I can't go back to using thicker ones! I highly recommend it!