This may, in fact, be a Chinese copy of a Binzel as i have been told that genuine Binzel handpieces are blue. Nevertheless the pull motor has been replaced while in my ownership with a genuine 42V Binzel item ($850). Since replacing the motor and setting it up with the appropriate plug to fit to an old Fronius TPS2700 it has performed very well. It is running fine on short stitches and welds in the lower range of available amps but became a little glitchy in that it was burning back quite frequently when used at higher amps and for long continuous runs that i now require it to do so i have replaced it with a new handpiece. Comes with a straight neck, Fronius rectangle plug fitted and a spare round plug that may fit other power sources. The pot on the back interfaces well with my power source and is used to adjust synergic welders from the handpiece which is super handy when you're 8m away from power source in a confined space and need to adjust the welding parameters.