Features: 1. Free steel reducer gear 2. Runva patent two stage planetary gear reducer 3. Two speed and clutch integrate with one handgrip 4. Runva patent clutch and speed shift structure 5. Clutch and two speed gear actions auto engagement 6. Hydraulic actions auto engagement 7. Counter balance vavle supplied 8. For engineering use 9. SWR tensioner supplied 10. Capable of lifting.