Specially designed for BERNINA oscillating hook models, the PunchWork Tool for CB Hook Machines is a useful tool for needle felting work with plied woollen yarns or loose wool fibers. It is specifically designed for BERNINA models with a CB hook. When doing needle felting work with BERNINA models with a CB hook, you will also need the special 5.5 mm needle plate as an additional accessory to the Needle Punch Set. Altogether these accessories allow you to create attractive patterns and motifs on home textiles and clothing.