Astech’s 3.5” service bit for ditchwitch is ideal for hard compact soil, gravel, cobblestone and sand. These bits are constructed from Astech’s Chrome-Moly Steel and include a series of teeth in front, proprietary extended wear button inserts along the wear edges and is heat treated to create a long lasting bit that delivers great results in the toughest of conditions- Made in the USA the weight is per Bit. While supplies Last we will not carry this product one they are gone.