Keyless Drill Chuck for 2-13mm, Keyless Oneway Hand Drill Chuck 1/2-20UNF Thread Spindle, Self-Tighten for Multiple Purposes Quick Connect Tool 1/2-20UNF Black & Red
Design: Conveniently tighten with one hand with the exclusive single sleeve design; Keyless and self-tighten type design is more in accordance with human engineering; The chuck can hold the drill bit tightly.