Robust and Durable: This chainsaw sharpener is made of high-quality aluminum alloy, ensuring durability, longevity, and corrosion resistance. Convenient and Portable: This chain sharpener is small and lightweight, making it easy to carry. Perfect for workshops and garages as no disassembly is required. No Chain Removal Needed: Simply clamp the chain sharpener onto the electric saw and adjust it to the position of the chain to be sharpened. Side gears rotate to adjust tension, keeping teeth in the same position for precise sharpening. Can be sharpened manually or with an electric drill. Save Time and Effort: No need to remove the chain; it's easy to use. Simply rotate the handle with each tooth sharpening for smooth operation. Precise sharpening ensures each tooth is restored. Wide Application: This portable hand crank saw sharpener is suitable for most chainsaws from 15 to 50 cm.