Review on Bosch HS2172 Ground Driver Hammer: Unmatched Power and Precision by Mark Crawford

I use it with a Hitachi electric jackhammer. I bought it to drive in a couple of ground rods but have also found it useful in the garden for driving 4 foot lengths of old 1-1/2 inch diameter steel pipe into the ground, around 2 x 12 lumber and railroad ties to support for slope terraces. What would have taken me a day if I could have done it with a sledgehammer was done in San Diego in 15 minutes in clay and river rock.