This is a Grovestand Onion Cutter.

It's a manual kitchen tool designed for slicing vegetables, particularly onions.

The slicer has a 3 3/4" diameter and is white in color.

It's described as easy to use and clean, and compact for convenient storage.

The tool is marketed for preparing blooming onions or similar dishes.

Made in China, this onion cutter is a convenient kitchen tool for efficiently slicing onions with ease.