What does the concrete vibration stick mean (insertion, a groove with a round head, universal, one)

The concrete vibration rod with this core is a round with a groove

In this way, it is called round head.It is an inserted concrete vibration stick.

ZN50 (universal type).There is a steel compilation

Head and steel braid flat head.The default is the steel head.

The models are: 25, 35, 50, 70.

The default is 50 types.

The picture below is a round groove with a round, with a total diameter of 50 mm

Meter.

The picture below shows the soft axis of manganese steel, with high hardness and large amplitude.High vibration force, durable.