How often have you wished for a second driver / drill when you were assembling a project? Instead of investing several hundred dollars in a new driver-drill, add this quick change chuck to your tool box. It lets you snap in hex shank driver bits and drill bits without pulling back on the collar, then remove them by simply retracting the collar and pulling out the bit! Chuck shank is 1" long for use in all 3/8" capacity Jacobs® chucks. Made in USA.