1. and sturdy - Shipping container accessories while being crafted from premium steel carbon material built to last and can handle work conditions, Boasting a minimum proof load of 51,500 PSI and an impressive tensile strength of 74,000 lbs 2. Easy to use: The shipping container jack lifter is easy to install and use, without requiring any skills, allowing you to solve the support problem of the shipping container by yourself, without seeking professional help 3. Shipping Container Jack Lug Leveling Attachment is what you need when your storage container is not level with the ground. Just insert the jack lug into the bottom of the corner casting of the container and then turn it upside down. Use a hydraulic bottle jack (sold separately) to raise the container off the ground. you raise your container to the leveled height you then place shims or wood under your container to completely level 4. Multi-purpose application - This attachment is suitable for a variety of joint port containers, shipping container homes, and other applications. It can be easily disassembled and installed, providing a wide range of application prospects Shipping Container Jack Lug, Jack Leveling Attachment - Storage Container Leveler Booster - Used to Level Shipping Container with Ground. Shipping Container Jack Lug, with Limiter, Shipping Container Jack Lifter, Shipping Container Accessories Attachment - Storage Container Leveler Booster. Min. Proof Load: 51,500 PSI Tensile Strength: 74,000 lbs Ground Clearance: 10inch Colour:Black Material:steel Package Contents: 1 x Shipping Container Leveler Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.