The extendable corner box finisher handle features an easy adjust with a "twist lock" from 48"-68". Fits every major brand of corner finisher boxes and lasts longer than any standard fiberglass corner finisher handle. Great for finishing the hard to reach tight corners and tough areas! The best priced extendable cornern box finisher handle on the drywall market. The value is un-matched. An extension handle for corner finisher box is an indispensable tool for your angle boxes.