Not much to explain here - it's a camping mallet for rent. Most use it for driving stakes into the ground, and it's best to not have to chase down the right size rock to use as a hammer and then the rock slides off the stake and crushes your hand. So yeah, that's kind of worth $2. Even more if you need to wake up your snoring buddy.
We have other camping tools to rent that can come in handy on any camping trip, and having these tools around and wearing a flannel shirt at least makes it look like you know what you're doing:Rent a camping saw
Rent a camping shovel
Rent a camping axe