Made of metal material, wear-resistant and not easy to deform. Wide range of applications, suitable for cylinder diameters from 51 mm to 178 mm in engines. The grinding stone with three claws is designed to quickly remove uneven scratches around the engine cylinder. Replaceable honing stones and self-expanding, retensioning honing arms for precise and efficient results. Flexible drive shaft, compatible with air or electric drills for versatile applications., Weight: 0.8046872563 Pounds, Manufacturer: QWORK