Feature: 1. Fitment: Our 7pcs engine cylinder hone set is adjustable and perfect for deglarzing engine cylinders ranging from 3/4 Inch to 7 Inch in diameter. 2. 3 Replaceable Stones: Cylindrical hone has 3 replaceable 4in long 220 grit stones. And spring pressure of the stones against the cylinder bore can be easily modified with the tool's knurled wheel. 3. Flexible Shaft: Equipped with a durable flexible shaft, this tool is both simple to use and capable of self centering, which facilitates work maneuverability in tight spaces. 4. Wide Applications: This cylinder hone tool set is suitable for automotive, aerospace, hydraulic, plumbing and heating applications, providing you with a solution for your engine maintenance needs. 5. Durable Metal: Cylinder hone tools are manufactured in metal with extra strength and durability to ensure durable and long lasting performance. Specification: Item Type: Engine Cylinder Hone ToolCharacteristic:1. For use in automotive, aerospace, hydraulics and plumbing and heating applications 2. For machining cylinder barrels before mounting new piston rings 3. For edge breaking, finishing of surfaces and honing work 4. Produces uniformly honed surfaces with high contact ratio 5. Honing does not increase the cylinder diameter 6. Only the surface is restructured 7. The honing marks provide the necessary oil adhesion 8. To be used with hand drills and stationary machines . Package List: 4 x Engine Cylinder Hone Tool 3 x Replacement Jaws 1 x Blow Molded Box