Tool Tuff 12" Industrial Duty Rock Auger, Hex Drive, Interchangeable Standard Carbide Bullet Teeth The Tool Tuff Direct rock augers are an industrial line of hex drive augers built for hydraulic power-heads used on skid-steers and front-end tractor loaders. Our rock augers are intended to be used with rock that fractures such as asphalt, concrete, etc. Rock auger specs: 9” diameter, 48” in length, 10mm flighting thickness. The input drive is for a 2” hex hydraulic power unit. The rock tip is entirely replaceable or can replace individual carbide bullet teeth. 1 year warranty against manufacturer defects, otherwise replacement rock teeth are available and affordable. Normal wear and tear not covered.