In our shop this has become affectionately known as the Vang Comp DNA Collector. The Vang Comp standoff breaching device is designed for law enforcement and military type breaching use, but has fast become a favorite of home defense people lately. The tube is machined from one solid piece of bar stock and is extremely durable. The front edge of the tube has a very aggressive edge designed for positive engagement to the door surface that is to be breached. Device includes Vang high strength spring.