Our new X-treme auger drive has a new robust planetary gearbox capable of driving a 48” diameter auger. The X-treme auger drive you had known in the past is now our Heavy-Duty Auger Drive and is still capable of driving up to a 36” diameter auger. The X-treme auger drive comes in a 2” hex drive while the heavy duty auger comes in a 2” hex or 2 9/16” round drive.