Material : Iron51-177mm Car Engine Brake Piston Cylinder Hone Shaft Three-jaw Cylinder Sander Bore Honing Tool for Cars Trucks Buses 18-63mmFeatures:Flexible shaft for easy use and self-centering.Knurled nuts are used to control tension and are widely used in cars, trucks, buses, tractors, industrial engines and small air-cooled engines.Adjust spring tension for positive cutting action and set diameter with spread limiter.Collar prevents stone breakage.Sleeve makes insertion in cylinder easy and protects stones when not in use.Specification:Main material: IronColor: Silver & blackQuantity: 1 PcNote:1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes:1 x Brake Cylinder Hone Piston