The 700 Series helm pump is a positive displacement axial piston pump based on the same design found in larger Wagner helm pumps. The pistons are ground and honed, then hand assembled for a precise fit, resulting in the most efficient manual hydraulic helm pump available. The pump is of rugged all metal construction with a hard baked-on enamel finish. The brass pump shaft is supported at both ends for extra strength. An external shaft seal is used allowing for replacement without removing the helm pump from the boat.