CobraTec zinc alloy knives are purpose-built to be the toughest automatic knives you can buy.
This claim starts with the use of 440C stainless steel blades. So, they're even tougher than the standard 440 stainless that we are used to in a quality knife.
But, it's more than just a tough blade. The CobraTec handles are made of zinc alloy, so they can take all the same abuse that the blade can take.
Also, everything on the inside is stainless steel. From the detents that hold the blade inside and outside to the carrier, to the spring all stainless steel.
The spring is also heat treated for longevity. A heat treated spring is discolored. They're not shiny and pretty like a spring that hasn't been heat treated, but CobraTec believes that you are more interested in longevity than looks.
Additionally, the glass break on the end is a steel ball bearing. The ball bearing is excellent for breaking a car window and allowing emergency escape.
Also, the belt clip is steel. It holds it's shape and strength very well.
Lastly, the switch is solid metal. Some are hollow. Some area even plastic. With CobraTec the switch is solid metal.
Every aspect of these knives are purpose-built to be the toughest automatic knives.
They do of course carry a lifetime warranty, as you would expect from a knife built to be the toughest.