The Accusize Industrial Tools R8 Shank ER20 Collet Chuck is a high-quality workholding tool designed for CNC machining and metalworking applications. This unit features a straight shank and a drawbar end measure of 7/16 inch - 20, ensuring secure and precise clamping of workpieces. The ER20 collet chuck type provides a versatile solution for holding various sizes and shapes of materials, making it a valuable addition to any workshop or manufacturing facility.