The Jacobs J912 Rubber-Flex Collet CAP is a high-quality machine tool chuck designed for precision workholding in CNC and metalworking applications. Made by the reputable brand Jacobs, this unit includes 4 collet caps ranging in size from 1/4″ to 3/8″ (6.4-95mm). The rubber-flex design ensures a secure grip on workpieces while providing flexibility for easy setup and removal. Ideal for industrial manufacturing and toolholding systems, these collet caps are a reliable and efficient solution for a variety of machining tasks.