Features: * brand new & high quality *It is mostly used for grinding chainsaw chains, and also suitable for grinding and polishing jade. *After polishing, the jade carving workpiece is finely ground and the machining accuracy and efficiency are far Higher than traditional oilstone polishing Specifications: *Type: grinding wheel grinding head *Shape: cylindrical *Diameter:4.8mm (suitable for small chain saw 325, large 8 chain)，4.0mm/5.5mm *Shank diameter: 3mm *Material: chrome steel jade *Suitable for: electric grinder, lithium electric grinder *Mesh number: about 120-150 mesh Package Contents: 5 x Grinding Wheel Grinding Head(Machine Not Included) Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data. Made of high quality material, durable and practical to use Brand new and high quality Good function and reliable to use We will ship it ASAP,when you place the order We provide perfect customer service, you can buy with confidence. If you have any questions about our products, you can feel free to contact us.