I guess that's why they were so cheap but do yourself a favour and pay more for a better product. The tip of the pen is like a sponge so almost no ability for any real detail. I also find the sometimes the screen doesn't register the pen is on it until you have moved half way through a character. Definitely do not recommend.
This stylus is so lightweight it is incapable of activating the touch screen unless you exert tremendous pressure but then the tip is so flimsy , when you do exert enough pressure the metal on the shaft of the pen scratches the screen .