Mine is a "Jackall Jack Mk 2"
Made in Canada, Is very hefty, and is around 20 year old.
I carry it across the chassis rails behind the bull bar, and it's been in all sorts of weather.
Paint missing (approx. 50%) and the bare steel showing has no sign of rust.
The only maintenance I give it is a quick squirt of WD40 on the reciprocating lugs about twice a year.
It still works flawlessly.
I don't know what its maximum rated lift capacity is, and can't find any markings on it that tell me.
But I do know that I used it one day to get a contractor out of a sticky situation.
His John Deere back hoe was bottomed out on a stump, and my jack lifted it enough to get a plank of redgum under the tires.
I guess they just don't make em like they used to.
I do not fear death itself... Only its inopportune timing!
I've come to realize that,,,,, the two most loving, loyal, and trustworthy females in my entire life were both canines.