Come On! Powerful Tactical Pen, Luxury Aircraft Aluminum Tactical Defense Pen,tactical Pen Self Defence Tool,amy Pen Emergency Tool (LED Lighting Black) Made of 6061-T6 High-strength aerospace aluminum,please don't touch the electrical source. Glass breaker and criminal DNA collector at top of pen.pen can write words as normal use .Sharpe side: high hardness stainless steel embedded tungsten steel Do not place under high temperature,or the ink will overflow.Affact you normal use Twist to open and close.