Features Made of high quality material, strong, durable and rustproof, can be widely used in cars, garages, warehouses, offices, homes and other places Converts impact driver to clamp non-quick-change drill and driver bits instantly, easy to use and improve work efficiency Keyless design: easily locks and releases the bit, quickly converts quick-change hex head drivers to drills Product Information Product Name: Hexagon Shank Conversion Chuck Product Material: Carbon Steel Product Specifications: 0.3-6.5mm Product Color: Black Packing list：Hexagonal shank conversion chuck *1 Please note: 1. Due to the long shipping time, the item may be damaged during transportation, if the item is damaged, please leave us a message through the official website immediately before posting a comment, I will solve the problem for you. 2. Due to manual measurement, the size may have 1-3cm error. 3. 3. The color displayed by different monitors may vary.