Some people may know what this is straight away but others may struggle picking it. No it's not a colander / strainer depending upon what part of the world you are from.
If you are a crafter you may know what it is but only if you like hand sewing.
I bought this one on our local online auction website, TradeMe, having never sewn on a page before. It has become an often used tool especially on layouts, though it recently got a work on on the ATC's I am making at the moment. (More on them later)