Jack stands

honestly it looks to me like the pin type would be stronger than a screw type, just because there is less metal holding the car up in the screw type

>Screw type is better imo. No welds or pins in shear
Just a friendly public service announcement.

>a screw doesn't get any stronger after 2 full threads of engagement

There's a shitload of thread engagement in a well-built screw jack, and that monoblock cast construction is reassuring as fuck. I used to work under 30 ton buses held up by these things.

Use cinder blocks the hood way nigga.

If you're just holding up a light car, any well build jack stand will do

I used to do this untill I left my car for 2 weeks and one of the blocks had started to crumble apart

why don't cars come with pneumatic jacks installed?

>why don't cars come with pneumatic jacks installed?
Even if the cost was zero, they would not put them in because there is no vertical stowage in the chassis for four of those jacks in each vehicle. The secondary concern is their added weight would decrease the MPG.

I use the 2 tonne Craftman ones with 2x4s just to be safe

have you ever seen speed racer?