Utoolmart Drill Chuck Key Wrench Made from solid carbon steel and coated with durable paint.Used for controlling tightness of looseness of electric drill clamping tool.Can be used in hammer or drilling mode.Ideal for drill tightening and loosening, keep your drill bits firmly in place.Helps with securing drill bits in hammer drills and is also universal for many other types of drills. Product Details A chuck require a key to provide the necessary torque to tighten and loosen the jaws.Allows you to keep your drill bits firmly in place for difficult jobs.Great for replacing lost or worn out drill chuck keys.Used for controlling tightness of looseness of electric drill clamping tool. Wide Applications Drill chuck wrench is suitable for most electric drill clamping tools and heavy-duty chucks; drill key replacement can be compatible with most electric tool brands to meet your needs for replacing lost or damaged chuck keys.