There are many versions of the popular Dr. Grip in Japan. This particular line has an "Off Road" image with bold body colors and a firmer grip. The pen body is even customizable. Each pen comes with a clear plastic insert that can be removed from the pen body, decorated, and reinserted to make your very own personalized pen. It's a very innovative way to customize pencils in low quantities, making them perfect gifts for friends, office parties, and more. One plastic insert is included inside each pen.