This item included 6pcs brass collets, which include 5 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. - Clamping Diameter: 0.5mm,1.0mm,1.5mm,2.5mm,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. - brass collets to fit rotary tools, pin vises. - Included 2.35mm 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 Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-CHhai shop 3