13mm Capacity Drill Chuck Key.

This is a 13mm capacity drill chuck key, which is a T-shaped tool used to tighten or loosen the jaws of a drill chuck. The product is packaged on a yellow and black blister card for retail sale. It is designed for use with electric drills and bench drills to manage the tightness of the chuck. These keys are typically constructed from hardened carbon steel and feature a black chemical finish for corrosion resistance.