Hydraulic impact hammer is built with a modular design made up of three major components—housing module, impact module and tool module. The modular design allows the three modules to be overhauled separately. It uses Ramlube for continuous greasing to both bushings in all conditions. Uses no tie rods or tie bolts. The m-Series is available in two models—the Model 14, which requires 48 gpm at 2,321 psi and breaks at a rate of 1,000 blows per minute, and the Model 18, which requires 58 gpm at 2,321 psi and breaks at 800 blows per minute. Designed to be used with excavators.