Renzetti Apprentise Cam Vise-C Clamp, The Apprentise Rotary Vise offers you functionality, simplicity and quality that a beginner as well as an experienced tyer will be satisfied with for years. The standard features of The Apprentise are a rotary head with an aluminum tension knob, black oxide jaw housing and jaws and a silver powder coated c-clamp with a 8″ hinged stem.