Is it a kind of tool?
No
Do they exist all around the world? In most places (see my response to Tanit's questions)
Oops! I've just noticed that I made a mistake when I told you how many letters the word has! The word has 7 letters. Sorry!
Since I made such a bad mistake, I'll give you a bonus clue:
The singular version of this word has only 4 letters.
(That should be a HUGE help.)