The Lightscale Camber Gauge is a black anodised alloy block that features 8  different angled planes in 0.5° steps from 0.5° to 4° on different surfaces.
The gauge is to be layed down beside a tyre for negative camber angles and any 90° part is put on one of the planes an pulled towards the tyre. Doing so you can easily check the camber of your tyres. To check positive camber, just turn around the gauge.
Turning the gauge upside down will make it a 10mm high block to support you measuring the droop of any 1/5, 1/6 and 1/10 scale Electric or nitro car.

Those are usually put on 10mm support blocks and beeing measured their droop with a special tool. The Lightscale ride height gauge (50160200) is a droop gauge as well and will do the job for you.