Material: The diamond wheel is titanium-plated, hard in texture, finely polished, and durable. Size: 5/32'' (4.0mm), 3/16'' (4.8mm), 7/32'' (5.5mm), applicable models: 5/32'' chainsaw and other small saw blade wheels, 3 /16'' small oil chain saw wheels, 7/32'' large oil chain saw wheels. Easy to install: The chain saw sharpener is easy to install and can be easily replaced and combed on most electric chain sharpeners. It is very suitable for grinding chain teeth, stone carving, jade, chainsaw chains, cemented carbide, gemstones, jade, molds, steel and other metal polishing. Package contains: 6 pieces in three sizes, 2 diamond chain saw sharpeners for each size.Specification: Model: Chain saw chain diamond grinding head Shape: cylindrical grinding head Material: Emery Granularity: 120-150 (mesh) Outer diameter: 4/4.8/5.5 (mm) Shank diameter: 3 (mm) Length: 45 (mm)