Description:

Diameter:43mm/1.69in; Length:58mm/2.28in; Connection Size:1/2-20UNF; Clamp Range:2 13mm / 0.04 0.51in . The chuck can hold the drill bit tightly and sturdy,not easy to loose.. Durable and has long service life,suitable for long time work.. Easy to install and disassemble,more convenient and labor-saving.. Large range of clamp size which range from 113mm,suitable for many kinds of drill bit.. Keyless and self-tighten type design is more in accordance with human engineering..