8mm chuck key for impact drills – 21.5mm hex drive – Heavy-duty gearing – Versatile professional tool

[DIMENSIONS] - 8mm driver diameter, 21.5mm gear diameter [FEATURES] - Durable and long-lasting T-shaped handle for easy use [FUNCTION] - During the tightening process, it increases the input torque, resulting in a high clamping force for the drill chuck [APPLICATIONS] - It can be applied to the chucks of compatible power tools such as electric drills, impact drills, hammer drills, and drill presses. [NOTICE] - Measure the size of the keyway in the drill chuck and use the appropriate drill chuck key for tightening.