These kind of Three-jaw regular steel body self-centering chucks are made of steel. It are divided into three types:GK11,GK11A,GK11C.Type GK11 provides two sets of clutches in different directions,which can be used respectively.Type HK11A provide ISO3442 standard clutches,and type GK11C provide traditional separate clutches.Model GK11 chucks are provide with a set of internal jaws and a set of external ones that can be used separately. |