The HCV is perfect for concrete pours in medium- to low-slump concrete, and at 180 cycles it produces three times the vibration waves for better efficiency in tough conditions. The motor is located in the head for maximum power, perfect for stiff concrete. For versatile jobsites, choose from a 2 3/8-in. head for larger jobs like dams or bridges and a 1 7/8-in. head for hard-to-reach places where wires and reinforcing steel are closely spaced. Allen Engineering Corp.