1. Made of TC4 titanium alloy, acid and alkali resistant, corrosion resistance, sturdy & durable;
2. With tungsten steel attack head (the hardness is next to diamond), it is better to use in case of an emergency;
3. Pull bolt design, 0.7mm writing thickness, smooth, black refill, easy & convenient to use;
4. The largest function of titanium alloy is decompression, people do not fatigue for using a long time;