Features: High quality brass collets to fitDremel, other rotary tools, pin vises. for most rotary tools used in hardware, hobby, home etc. Clamping Diameter: 0.5 /0.8/ 1.0/ 1.2/ 1.5/ 1.8/ 2.0/ 2.4/ 3.0/ 3.2mm This replacement brass collet provides a big improvement in precision and holds these tiny bits far more securely and in better alignment with the rotation of the tool Under high-speed rotation, it not only maintains stability but also improves work efficiency. Specifications: Material: Brass Color: Golden/Sliver; Specification: 0.5mm, 0.8mm, 1.0mm, 1.2mm, 1.5mm, 1.8mm, 2.0mm, 2.4mm, 3.0mm, 3.2mm Size: approx 16 x 4.8mm/ 0.63x 0.19in (Golden) 15.5mmx9.12x3.9mm/0.61x (Silver) Weight: 20g Quantity: 11PCS/Set Overall Length approx 15.5-16mm/0.61-0.63"" Note: 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! 2. Please allow slight measuring deviation due to manual measurement. Package includes: 11PCS X Brass Collet Chucks