1 High Performance: Constructed with metal and grinding stone premium materials, ensuring stable performance, outstanding grinding performance, and durability for long lasting surface treatment results. 2 Enhanced Engine Performance: The uniform stone particles effectively remove metal protrusions inside the cylinder, leaving a smooth surface to improve engine performance and extend its lifespan. 3 Easy Installation: 4 inch in length and 10mm in width, these stones can easily be inserted into your cylinder honing tool, and can be conveniently removed for storage when not in use. 4 Powerful Function: Designed for honing engine cylinders, these replacement stones provide excellent precision and control, helping to achieve a smooth, perfect finish. 5 User Friendly: These engine cylinder hone stones are easy to install and use, making them suitable for both professionals and DIY enthusiasts, saving you time and effort.

What's in the box
3 x Cylinder Hone Stones