This is a Cake Masters Optical Illusion Cutter set. 

It is a 2-piece set designed to create mesmerizing geometric designs on cakes, cupcakes, cookies, and other pastries. 

The set includes two different-sized cutters, approximately 4cm x 2cm and 3cm x 1.8cm. 

It is made from durable plastic. 

To use, you need sugar paste in three different colors (dark, light, and medium) to achieve the optical illusion effect.