I have a Carrick pewter handled Skean Dhu. It's like this one, but with a black sheath.

http://dunnoon.co.uk/scottish_kilts/...?ProductID=384

The blade is pretty sharp. It's the perfect thing for opening packaging, cutting ribbon for gift-wrapping, or cutting a flower from a neighbor's rosebush to give to one's lady-love.

Push come to shove, I suppose it could also be used as a weapon of last-resort.