These are suitable if you have a scenario that doesn't involve a lot of impact. I tested them while running the trails in Death Valley with washboard relief. The shovel will rotate, so you have to make sure the shovel doesn't hit your car. The collar sagged from the axe, which bothered me. I think it was the warmth that makes it stand out. I solve the problem by adding U-bolts, which defeats the purpose since that's what I wanted to use in the first place.
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