Im very new to trying this out, but i had the idea a few days ago. I want to make a blade that can be hidden under my wrist, have a jacket on (Dont worry, im not doing anything dumb, just to kind of give you an understanding of what im workin with) Anyhow, i have a blade, i want to put it into a metal case (rectangular i guess) and im not sure if i want to have to swing my arm for it come out or have an easily accesable button on it. If anyone could spare possible gadgets to help make this possible i would be ver gratfull. 