The simplest way to think about the types of security cameras is to break them down into two groups: indoor cameras and outdoor cameras.
The advantages of this system has been known for many years and are documented through-out the internet for your reading pleasure.
The weight reduction when opening the valve (top collar and half the spring) is about 27 grams per valve less than stock.
What this means is a shell develops underneath and above the surface that is very hard and cannot come off under even the most extreme conditions.
Further, there is a second process applied on top of this hard shell that produces a very low coefficient of friction, some very slippery stuff.
This Black Diamond process improves wear properties, reduces friction, and provides resistance to corrosion and wear that is superior to chrome and nickel electrolysis plating.