very disappointed in the supplier, the service has been very bad and the product arrived incomplete, the rotating jaws arrived smaller in size and very different from what was offered, the deep penetration pin was missing, it does not have an operation manual, they sent me 4 videos Less than a minute, simply garbage, 110 volt power supply cable and the equipment is 220 v, they do not answer the questions, the engineering is improvised for 10 years What I have bought in China, this has been the worst thing I have ever had, too many flaws for such a simple device.

Good