This is a stainless-steel pizza cutter wheel with an ergonomic plastic handle. 
It features a large 10 cm (approx. 4 inches) diameter stainless steel blade for smooth, clean slices through various crust types. 
The ergonomic handle provides a comfortable and secure grip. 
It often includes a built-in finger or thumb guard for safety during use. 
The durable design is often dishwasher safe for easy cleaning.