Description: Flexible shaft--The flexible shaft and self-centering.Controlled and extended control limiter are functions that help cylinder to another cylinder faster with the cutting action. Durable--Made of high-quality metal materials, it , wear-resistant, durable and has a long service life. Protective--Sleeve makes insertion in cylinder easy and protects stones when use. Two sizes to choose from--There are two sizes to choose from, suitable for cylinders with diameters of 51-177 mm. Scope of application--Knurled nuts are used to control tension widely used , trucks, buses, tractors, industrial engines and cooled engines. Specification: Diameter 51-177mm / (XL) Size Chart: 42.8x12.2x4cm/16.85x1.57.80x4inch 43x12.2x4cm/16.93x1.57.80x4inch Package Includes: 1* Engine Cylinder Hone Tool Note: 1. Please allow slightly error due to manual measurement. 2. Due to between different monitors, the picture may not reflect the actual the item. 3 shopping!