The desirable properties for throwing knives differ from those of a
common pocket knife. Knives used are almost always one-piece, rather
than the traditional knives that have a handle manufactured separately
from the blade. The purpose of this design is to create a durable knife
with a balanced distribution of weight. Additionally, some throwing
knives are double-edged, although the edges of throwing knives are
almost always dull (to prevent the knife from cutting the thrower’s
hands in some grips). The knife sticks through penetration of the
sharpened point into the target, hence sharpened edges are unnecessary.
As the knife’s sharpness and its ability to hold an edge are of little
importance, other factors such as weight distribution, overall weight
and especially durability become important.