Quote Originally Posted by chasem
are those practical? I mean, for use as a knife as well.

for $10 I might just pick one up.
It's a serrated plastic edge. I wouldn't try cutting mountaineering rope with it, but it's reasonably sharp. Makes one heck of a box cutter.

The edge can be resharpened with an emery board, too. I wouldn't imagine that it'll keep an edge for long.

Amazon sells three-packs for $25.71. Try a search on Amazon for "FGX".