To my delight, these dangerous daggers were safely displayed behind glass at Jerusalem's Museum of Islamic Art.
(Yes, it's ABC Wednesday D-day.)
The kind without a fancy hilt is called katar, I think.
They are all antique daggers from around the Middle East.
Besides being a weapon of war, the dagger is useful in hunting and eating, and a beautiful one can be a ceremonial status symbol.
UPDATE: You can see the 4,000-year-old stone pommel of a Canaanite dagger that we unearthed at the Holyland Park dig in Jerusalem in an earlier post..