Vestil MMJ Mechanical Machinery Jacks, models MMJ-3, MMJ-6 and MMJ-10 are good for repairing vehicles, lifting trucks, railway maintenance, construction, mining, and agriculture. Compact design with collapsible lever offers easy operation and simple maintenance. A self locking, anti-kickback operating lever reduces injuries. Standard features include: folding handle, two carrying handles and a large base plate. Lifting and lowering speed is controllable. No seals to leak. Will not drift down even after an extended period of time.