This is a typical Dutch tool, a cheese slicer and to make it even more Dutch, the handle. It is a genuine hand-painted Delft blue ceramic handle, that you will recognize from the Delft blue pottery.
A sharp stainless steel blade enables you to slice all Dutch cheese and most semi-hard to hard cheese. So you can slice Cheddar, Gouda, Raclette, Havarti, Jack and more. The slicer can also work when you want to slice zucchini or cucumber or similar vegetables.