This is a plastic pastry wheel decorator and cutter set. 
The set typically includes two tools: one for cutting dough and one for creating decorative edges like braided or fluted designs. 
It is designed for use on dough, pastry, pasta, or fondant. 
The tools help create consistent, professional-looking edges for pies, quiches, and ravioli. 
They are usually made from high-grade plastic materials.