This product is a convenient and practical threaded chuck, made of strong and durable materials, which without being easily damaged. It has a good fastening effect and is mainly suitable for machine tools and milling machines. It is stable in installation and not easy to fall off. It can bring convenience to your work. It is a very efficient and practical part that will well meet your needs. Features - Color:Black. - Material: Steel. - Size:About 10.00X3.00X3.00cm/3.93X1.18X1.18inch. - Made of sturdy and durable materials, safe to use and durable. - craftsmanship makes it have practical functions and can play a good fastening effect. It is a great threaded chuck. - The convenient and practical internal and external threaded chuck can be easily used with other related tools. - It is easy to install and use, has good stability and will not fall off easily. - You can buy this professional and practical internal and external threaded chuck at an . Package list: 1 x Threaded Collet Stop Set