A stabilized jack stand for a vehicle comprises a vertically directed leg for location on a foot, and an extendable portion for supporting a vehicle chassis, the leg defining a peripheral area relative to the foot plate. One of the sides of the key is beveled. At least some of the embodiments disclosed herein provide access to the pericardial space for removal of accumulated fluid. The mechanism has a detergent holder and a detergent control switch. The pressure enclosure may be a cylinder of a pump for pressurizing fluid or gas, with the first component a cylinder body, the second component an end cap and the third component a valve body, with the load chamber biasing the valve body against the cylinder body.