I found this smooth tool with a hole on one end at grandma’s house. What does she use it for?

One-Step Banana Slicer: What It Is
A banana slicer is a small, handheld kitchen tool designed to slice bananas quickly and evenly. The images show a yellow, hinged handle with multiple curved metal blades that cut the food into uniform rounds in a single press.
Main Use
This tool is made to:
- Slice bananas in one step for fruit salads, oatmeal, cereal, yogurt bowls, desserts, and lunchboxes
- Create consistent, even slices that look neat and cook/serve evenly
- Speed up meal prep by cutting multiple slices at once
- Slice soft foods of similar shape, such as sausages, hot dogs, ham sticks, or other soft cylindrical foods (depending on thickness and firmness)
How It Works
The slicer uses a set of parallel blades arranged in a curved cutting head:
- Place the banana (or similar soft item) on a cutting surface or plate.
- Position the slicer over the food.
- Press down firmly once.
- The blades cut through and produce multiple slices at the same time.

Why People Use It
- Faster than a knife for quick snacks or fruit bowls
- Uniform slices for presentation (fruit platters, desserts, kid lunches)
- Less mess and fewer steps when prepping multiple servings
Best Foods for This Tool
Works best on:
- Bananas (fresh, not overly mushy)
- Soft sausages/hot dogs
- Soft deli-style pieces that fit the slicer width
May not work well on:
- Very hard foods (too much resistance)
- Large or thick items that don’t fit the cutting head
- Foods with large pits/seeds or uneven shapes
Safety Notes
- The blades are sharp, so:
- Keep fingers away from the blade area when pressing
- Store it out of children’s reach
- Wash carefully to avoid contact with the cutting edges
Cleaning and Care
- Rinse immediately after use to prevent sticky residue (banana can cling).
- Wash with dish soap and water; use a brush if needed around the blades.
- Dry fully before storing to keep the metal parts in good condition.