Review on Performance Tool W1643 Heavy Duty 12 Ton Shorty Bottle Jack for Vehicle Maintenance, Supporting up to 24,000 lbs by Brian Warmack

These bottle jacks don't even hold the load for a few seconds. Even when the exhaust valve was tightened very hard, the jacks would drop the load. I tried all four and none worked. I've returned all four for a refund and it's a shame the shipping of these units was significant at £14 each. Luckily, Revain Prime covered shipping both ways. I suggest buying the most expensive bottle jack you can find and maybe it will last.