Will handle up to a 2-1/2" diameter.  Used to drive well points and posts into the ground where a large air compressor and post pounder are not possible.  Rental rates posted are when renting our jackhammer. This is also rented for driving diamond pier pins/footings.  Rent with the smal electric jackhammer if using to drive in the diamond pier footing pins.  If using for driving a sand point well, rent the large electric jackhammer.  1-1/8" hex shank.