FAST RESULT: The chainsaw files feature full and evenly distributed particles, enabling steady and efficient sharpening of the chain saw chain. Achieve sharp results in just a few minutes, eliminating the need for time-consuming hand sharpening. DURABLE: Made with the latest titanium-plated diamond wheels using an advanced titanium plating process, these files offer up to 20% longer lifespan compared to non-titanium-plated alternatives. EASY TO USE: Specifically designed for electric chainsaw sharpeners, these files require only two steps to replace. The titanium plating enhances hardness, reducing the frequency of replacements. Note: Black spots may appear on the wheel surface. This is not due to coating脱落 (falling off), but rather the mixture of titanium and silicon carbide, which improves performance. SUITABLE: 3/16 inch wheels fit 0.325 inch and large 3/8 inch chainsaw chains. Material: Emery Color: Gold Package Contents: 8 x Burr grinding stone file 3/16 inch Note: The package includes only the items listed. Other products are not included. Note: Slight color variations may occur due to lighting and display differences. Measurement error allowance is +/- 1-3 cm.