Features: This 5C collet set is crafted from high speed steel and undergoes rigorous quenching, significantly enhancing hardness and rigidity for high frequency machining applications. Featuring collets with high concentricity through advanced turning and grinding, the set minimizes clamping errors, ensuring accuracy, and deliver consistent workpiece quality with smooth edged. Designed for professional machinists, toolmakers, and engineers in the metalworking industry, it provide accessories for demanding machining tasks. Ideal for use in lathes, grinding machines, and other machining equipment, handle various workpiece shapes and sizes with its assortment of square and hexagonal collets, boosting efficiency in manufacturing and production environments. With its comprehensive design, this hardened steel collet set exemplifies quality and is essential for enhancing productivity in mechanical workshops. Specifications: Component:High Speed Steel Square collet block: 4.45x4.45x7cm/1.75x1.75x2.76inch Hexagonal collet block: 2.5x4.45x7cm/1x1.75x2.76inch Collet: 4.3x11cm/1.7x4.33inch Package Includes: 1 Set 5C hexagonal Square Block note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.