Feature●Package includes: 1 x black 4486 drill bit lining shaft, 1 x silver 4485 collet, 8 x mini brass collets with diameters of 0.8 mm, 1.2 mm, 1.5 mm, 1.8 mm, 2 mm, 2.4 mm, 3 mm, 3.2 mm.●✅【High Quality Material】The drill chuck is made of high quality brass, which has high hardness, wear resistance and durability. It has higher durability and longer service life than aluminum parts.●✅【Optimal Precision】This keyless drill chuck provides a great improvement in precision and keeps these tiny bits much safer and in better alignment with the rotation of the tool. Be sure to measure the contrast size before purchasing.●✅【Multifunctional】: This kit is suitable for almost all tools, except for series 1 and 2, as well as for models 260, 270, 280 and 4200.●✅【After Sales Service】: If you have any questions about the product, please feel free to contact us by email at any time. We will answer your questions within 24 hours.Description