We recently created a low down front mount option to one of our hydraulic breakers so that it could be used as post knocker as well as a breaker. Locating the front mount low down means that the excavator can hold the attachment at the correct working height range for post driving.
We also carry post knocker tools in stock for the 4TÉ TouchStone/SlimStone models; FRB-351, 451, 751 & 951. They simply fit in place of the chisel.
