This item included 11pcs brass collets, which include 11 different sizes. It can be use for for punching ABS board, light wood board, cardboard, etc. brass collets to fit rotary tools, pin vises. It is compatible with most rotary tools used in hardware, hobby, home etc. Features - Color: Golden. - Material: Brass. - Size: 0.9 x 0.9 x 2.8cm. - Made of full copper source material, durable and practical, and . - Clamping Diameter: 0.5mm,0.8mm,1.0mm,1.2mm,1.6mm,1.8mm,2.0mm,2.2mm,2.4mm,3.0mm,3.2mm - This item is a pack of 6pcs brass collets, which including 5 different sizes. You can choice the collet as you need. - copper collets to fit rotary tools, pin vises. - Included 11 different size brass drill clip, let you use it more easily. - Compatible with most rotary tools used in hardware, hobby, home etc. - Powerful and practical tools. Can be use for for punching ABS board, light wood board, cardboard, etc. - Warm Tip: Dear buyer, Due to lighting effect, monitor's brightness, manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand! Thank you! Package list: 1 x Rotary Tool Collet Set