The Pratt Burnerd 12 Pc EC MultiSize Chuck Collet Set is a high-quality set of lathe collet chucks designed for precise workholding in CNC, metalworking, and manufacturing applications. With sizes ranging from 1/8" to 1.5", this set includes collet chucks of various sizes to securely hold workpieces of different sizes. The Pratt Burnerd brand ensures reliability and durability, making this set a valuable tool for professionals in the industry.