... The featuer of Ultrasonic hand welding units 1, It is small and convenient for working,Operate flexible and convenient ,handle type ... .4, Especially suitable for 1-15mm spot welding.5, Riveting,spot welding,pattern welding,dot welding,etc.6,Whole-set excellent elements assembly, ... 7,Fix the rhinestone on clothes,shoes,trinkets,the spot welding for plastic part,screw implanting,rivet joint.8,widely ...