What is Double Blades?

There are certain moves in martial arts which are named so you the user can quickly relate name action and application. This has always been true in the art of Kenpo Karate. Here is a simple example of what I am talking about.

Double Blades.

Strike the inside of your attackers striking arm with both your hands held in the "chopping" position hence the name "Double Blades". Ideally one chop strikes the bicep and the other strikes forearm. The strikes should stun the attackers arm thus delaying any follow up action as you proceed with follow moves which might be more strikes,  a takedown and/or jiu jitsu locks.