[Calvin Locke]

My first thought too, but weren't they shaped from "screens" of spring steel?

I bet that they would have shredded much sooner.

[fso301]

My first thought too, but weren't they shaped from "screens" of spring steel?

I don't remember exactly but they were designed to move the lunar rover and they performed their job well. How well they would have done on Mars I don't know but they weren't designed for such conditions.