Application range This jack works on the principle of hydraulic pressure. Due to its compact structure, small size, light weight, and handling, it is widely used for ground fluidity lifting operations. It is particularly suitable for vehicles, tractors, etc. as tools for vehicles. This jack is only allowed to be used upright, and cannot be used on its side or upside down. The operating temperature is -40 °c ~ 45 ° c. It is forbidden to be used in places with acid, alkali and corrosive gas. With proper and regular maintenance, this hydraulic jack can be used for a long time without leaking. Rotate screw up when height is not enough. Use it uprightly, not edge-on or upside down. Specification: Model Number : Car Jacks Material : Steel Color : Red Type 1 : 5/10 Ton Lifting Jack Features: Enlarged base ensures stable and safe using. Oil return valve operation is simple, convenient and quick. Whole body casting, thickened steel plate. Long time use and does not leak. Skid resistance lines on the top. Oiling Maintenance: 1. Put jack in vertical state. 2. Lower the pump and piston, until it is completely loose. 3. Remove the rubber oil plug. 4. Pour into high quality hydraulic oil. 5. Mount rubber oil plug. 6. Regular lubricate transmission joint and adjusting screw. Enjoy your shopping.thank you and have a good day!