*Fitted with Fine Stones. *Knurled Nut Controls Tension. *Flexible Shaft for ease of use and self centering. *Flexible shaft, controlled spring action and spread control limiter are features which contribute to faster changing from one cylinder to another with fastest cutting action. *Engine Cylinder Hone Extremely versatile hone for 19 - 64mm or 32-89mm diameter cylinders found on cars, trucks, buses, tractors, industrial engines and small air-cooled engines. Size 1inch: *Grinding Stone Length: 28mm / 1-1/8" *Overall Length: 205mm *Diameter Range: 3/4" to 2-1/2" (19-64mm) Size 2inch: *Grinding Stone Length: 52mm / 2" *Overall Length：235mm *Diameter Range: 1-1/4" to 3-1/2" (32-89mm) Package includes: 1 x Car Engine Brake Cylinder Hone Flex Shaft