Ditchwitch 3.5 inch Service Bit Duck Bill #1Astechs 3. 5 service bit for ditchwitch is ideal for hard compact soil, gravel, cobblestone and sand. These bits are constructed from Astechs 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.