Screw jacks can be inserted into platform legs, and allow for stages to be leveled on uneven ground.  The screw jack is a high tensile steel threaded tube with a short arm nut that allows for easy adjustment.  The threads are rounded (not acme) to guard against debris build-up.

Size(s)	Carrying Weight	Load Capacity
12" 16" 24"	5 lbs 6 lbs 8 lbs	2000 lbs 2000 lbs 2000 lbs