I've just bought one of these:
Pity I can't get across from a mere photo how dinky this thing is for a claimed 4 tons. I recall having 4 ton hydraulic bottle jacks in the
70 and they were very hefty & robust affairs. This isn't. So...Should I be worried? Are mechanical things getting smaller and lighter rather like electronics have been for decades? Have the laws of physics changed, enabling the design of flimsy looking things to bear great weight?
Your reassurances sought.
Cheers,
cd