The back of a knife is called the bolster.
a fake wooden knife :)
A whittling knife?
A palette knife.
obsidian knife
A bayonet is the name of a knife attached to the barrel of a rifle.
Another name for a soft knife would be soft knife an a straight knife.Maybe even a rounded knife
A throwing knife[EDIT] There is also the tactical knife attachment for handguns and the regular melee knife. If you are asking for the real knife name then the name of the knife is tatang combo edge knife by blackhawk here is the link http://www.copsplus.com/prodnum7216.php
Tactical Knife
No special name, knife or cutlery dealer.
The name of John Herny Doc Holliday's knife was HellBitch.
You put it behind your back.
The Buck Knife 110 is a folding hunter or lock back folding knife. This knife is foldable and features a stainless steel blade, wooden handle and a leather sheaf.