Striker Air-Operated Post Driver - 2 CFM, 90-110 PSI, Model# 43000 &#160;Air assist operation uses air to lift the driver weight &#160;Easy to use handle switch air activation &#160;Ideal for use with all metal posts up to 1 3/4in. dia. &#160;Capable of striking 60 times per minute Works in a variety of soil types