I had a penetrating pen a few years ago , I amazed family and friends more then a few times. But never felt comfortable performing in the street . This self contained and luxurious appearing pen is with me always now I can with confidence bring it out leaving my sharpie so I can have some variety and it slays. Especially when someone may have known of the original when they get to inspect before and after without my hands leaving sight. It floors them and very pleased with it. The mechanism is a little stiff at first but it will break in and become smoother after some use. Excellent highly recommend the perfect pen!!!!