The Tao pen design is an evolution and different from the other aggressive-looking pens and kubotans on the market. It does not look threatening, but is a useful, high-tech writing instrument with a stylish design. If the user is threatened or attacked, the Tao can be used at three levels of defensive force, depending on the type of threat. The Tao pen is made of 6061 aluminum, precision-machined and hard anodized. The heavy cap is threaded so that it will not pull off in use and castellated for greater impact. The flutes and grooves on the pen provide a secure grip. MSRP $70.