Keyless Hand Drill Chuck 1/2‑20UNF Mount 2~13mm Self Tighten Drill Chuck For
Large range of clamp size which range from 2~13mm,suitable for many kinds of drill bit. Clamp Range:2 ~ 13mm / 0.04 ~ 0.51in. The chuck can hold the drill bit tightly and sturdy,not easy to loose. 1 x Drill Chuck.