Drill Chuck Key (10 mm)GENERAL PURPOSE: Drill chuck key is your one needed tool for drill locking and unlocking. Allows you to keep your drill bits firmly in place for difficult jobs. Helps with securing drill bits in hammer drills and is also universal for many other types of drills. The small key allows for easy storage and use. CONSTRUCTION: Made from solid metal and coated with durable paint, this chuck key will be able to last through any job you can throw at it.