This is a high-quality Techniks 7/16" Super Precision ER32 Collet with .0002 accuracy, perfect for CNC chuck milling. It is designed to hold tools securely and accurately, ensuring excellent performance and reliability in your workholding and toolholding needs. The collet is made with top-notch materials and precision, making it an excellent choice for professionals in the business and industrial sectors, particularly in CNC, metalworking, and manufacturing. Its California Prop 65 warning applies to chemicals known to cause cancer, birth defects, or other reproductive harm.