One of the first things to surprise me was that I found a 20V/4.0Ah cordless angle grinder called YQ-1050-10 and it seems like quite an interesting grinder! It is one of the cordless tools family, with a top - notch brushless motor. This cordless grinder machine has been designed keeping in view the ease of use and flexibility. The 4.0Ah battery packs a punch, driving the grinder sensibly briskly for most grinding jobs that will dominate its lifespan on site Cordless design for easy mobility—working in any position, anytime and anywhere without having to worry about cords. This is a tool useful for professional as well as DIY users.