Our post auger is designed for use with Bobcat, Caterpiller, John Deere and most other skid steer brands. It is rigid enough to handle the down pressure a skid steer can apply. The planetary drive has a 2-9/16" output shaft attached to a Mini Agressor Pango auger bit. The open design gives the operator more access to the drive componets. Swivel capacity in both directions will keep your bit vertical regardless of terrain. A 9" bit (our most popular) is included in the purchase of this item. Please call for quotation (770-546-0013) if additional sizes are required. We know of no other auger drive as rigid as this one regardless of the price. The hot dip galvanized feature will maintain the rigid integrity for years to come.