These are the Barry M nail art pens I bought, they are amazing, and so good for the price. I use them all of the time to create lovely patterns or designs on my nails. They are so easy to use, you just press the pointy tip down until you see the liquid on the tip and use like a pen. You have to have a steady hand, and take your time, this will of course take some practice. There are many other brands that do similar pens in several colours, but these so far are my favourite.