1. Durable 2. Smooth startup 3. Iron claw anti-wear 4. Forward and reverse rotation optional 5. Suitable for Robin EY288/EY28C gasoline engine 6. Backhand: mainly used for pastoral management machines, ditching machines, etc. 7. Forehand: mainly used for road cutting machines/generators/winding mills, etc. 8. Size: hole distance 17cm, center diameter 6cm