Durable material: ABS and steel construction provide long lasting durability, safety, and reliability. Stable performance: Fine craftsmanship and solid stability enable easy operation and consistent sharpening results. speed sharpening: No load speed 500018000 r/min with a 3.6V power supply to efficiently meet various sharpening needs. USB charging and portability: Compact, portable chain saw sharpening tool set that can be charged via USB for convenient on the go use. Compact and lightweight: Designed for easy handling and transport, suitable for regular maintenance and field work. Use scenarios Field maintenance on forestry or job sites: quickly restore chain edge after cutting, maintaining cutting efficiency without returning to a workshop. Home workshop upkeep: perform routine chain sharpening to extend tool life and reduce dulling during projects. Camping or emergency readiness: USB charging allows use away from power outlets, keeping chains sharp during outdoor trips or in emergencies.