1/2-20UNF Quick Replacement Keyless Drill Chuck

A great accessory for all your drilling tasks, Easily change from fastening to drilling with quick connect. Material: Constructed with all metal for supreme durability suitable for long time work. Accessory: Mount: 1/2-20UNF *1/4"hex shank and 1/2-20UNF*SDS-Plus shank. Clamping Range: 2-13mm (0.04~0.51 in); Connection Size:1/2-20UNF. 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.