This self-centring 4 jaw lathe chuck can perform a wide range of tasks, expanding the possibilities of making your original designs. It also proves high clamping accuracy on a wide range of surfaces, such as a fixed solid or hollow circle material, a triangular material or a hexagonal material. It is made of high-quality steel with high hardness and wear-resistance, making it strong and durable. This chuck is with 4 jaw design, self-centring, compact size and easy to use.