Most roto hammers use one of the following systems: SDS-Plus, SDS-Max or Spline. Get the power you need. CPO offers a wide range of power options from 12V to 18V and 20V, all the way up to 120V. Choose from either corded or cordless rotary hammers. CPO has a wide selection of trusted such as Bosch, Makita, DeWALT, Milwaukee, Metabo and Metabo HPT.