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. product is limited as the company has discontinued production for stock. call or email to check stock before ordering. the product can be produced in quantities for customers should they wish.