2.Durable Construction for Long-Term Use---This ram jack has a smooth surface with distinct ring marks, which not only ensure smooth lifting but also provide a good grip. The piston is treated with a blackening process, significantly extending its lifespan. This durable construction means you can rely on it for long - term use without frequent replacements. 1.It effectively maximizes the jack's stroke within the body height, allowing you to lift weights to a greater height. This makes it a more convenient and practical choice for various applications. 4.Leak - Proof and Dust - Resistant Design---The joints of this hydraulic jack are equipped with a plastic dust - proof cap. It prevent oil leakage and keep dust away from the internal components, maintaining the jack's performance over time. This leak - proof and dust - resistant design ensures that the jack remains in good working condition. 3.Convenient Mounting Options---Featuring two pre-drilled holes, this multi - section jack offers convenient mounting options. Whether you need to install it in a workshop, these holes simplify the mounting process. Just note that after pressure release, the piston needs external gravity to retract. This hydraulic cylinder jack can be used in power, chemical, steel, bridge, shipbuilding, machinery and other industries., Manufacturer: EYRMQWJPC