Cal-Van Tools Engine Cylinder Hone features an extremely versatile hone for a 2 inch to 7 inch (56 millimeter - 178 millimeter) diameter cylinders. They can be found on cars, trucks, buses, tractors, industrial engines and small air cooled engines. It is adjustable to all diameters within its range. It has a flexible shaft and controlled spring action. The spread control limiters are features that contribute to faster changing from one cylinder to another with the fastest cutting action. It can be operated with a high or low speed drill.