Murray Craftsman Estate 825 Snowblower 12 Dia Auger Rakes 1 Bore 8.25 PipesThis is a set of augers from an Estate 825 snowblower. They measure 12″ in diameter and have a 1″ bore. The center pipes are 8 1/4 long. These are used in many Murray sub-brands such as Craftsman, Estate, Spirit etc. They.