Kisankraft Pack of 4 Accelerator Spring is a genuine replacement set for 2-stroke brush cutters, compatible with KK-BC-555, 7640, and 8640 models. These springs ensure reliable tension and smooth return action for the accelerator mechanism, supporting precise throttle control and efficient engine operation. Durable and easy to install, they are ideal for maintenance and repairs, helping to maintain consistent performance in demanding agricultural and landscaping environments.