Need helo picking a knife.

[TheGame]

My dad is in need of a knife for work. He would like it to be:

Somewhat of a filet type, however if needs to be sturdy, so it cannot bend.

6-8" blade is wanted.

It would be used for cutting Insulation, and I would prefer Stainless Steel because he DOES sweat a lot, and we works in the rain quite often.

I am not sure what would be good for this, as I never cut insulation, I am screwing it down, never cutting.

Any help?

 

[TheFighter88]

Though it's around 4.25" long, I've heard Fallkniven's Fillet knife is a bit beefy... might be what you're looking for.

Here's a link:
Falkniven's F2

 

[cmdionne]

Why not something expressly designed for cutting insulation?

http://www.amazon.com/gp/product/B0009MZI4W