General description This 2-13mm Heavy Duty Professional 1/2-20 UNF Quick Change Keyless Drill Chuck Tool is designed for durability and efficiency. It features a locking function that prevents hammering and strong vibrations when the work is released, ensuring a secure grip during operation. The comfortable jacket surface provides a strong grip, enhancing the output torque for better performance. The unique thrust bearing allows the torque applied to the handle to translate into greater gripping force, making it suitable for heavy-duty tasks. Technical specifications Material: HSS Shank Length: 46mm Head Diameter: 43mm Clamping Range: 2-13mm Mount: 1/2-20 UNF Size: 122 x 42mm Compatibility and accessories Applicable for impact drills with a power of 1050W and above Includes 1 x SDS Chuck Adapter