Connection Size:1/2"-20UNF,Clamp Range:1-13mm.100% brand new and high quality.Nice drill chuck replacement/upgrade on your drill.
Easy to use and install:The chuck can lock onto the bits tightly and sturdy,not easy to loose.Compatible for various brands as Dewalt, Bosch, , Kobalt, Milwaukee, etc.
Keyless and self-tighten design: Conveniently tighten with one hand, breaking the traditional locking methods.
Easily convert your rotary hammer/impact wrench/impact Screwdriver into a drill rather than spending money having multiple.