6.25" overall length. A Glass breaker and stainless folding blade housed in the top of the pen are ideal for emergency situations and self-defense. The bolt action opening/closing mechanism allows for easy deployment of the blade. The pocket clip allows for easy carry to ensure that this pen and life saving tool are always with you. The Aircraft aluminum body with an ergonomic grip make it durable and comfortable to hold when writing.. Fisher Space Pen ink cartridge. 1.5" ensure optimal performance as a writing pen.