Automatic grinding, a high-quality stainless steel blade, a one-button switch, a 2500mAh battery capacity, and both cord and cordless operation with DC and Type-C charging options. Hair clippers are tools used for cutting hair. They typically consist of a housing unit containing the motor and power source, and cutting blades that shear the hair. Different guard lengths allow for various hair lengths and styles. Early versions were manual, but in 1919 Leo J. Wahl invented the electromagnetic hair clipper.