Here's the one I use.
http://piedpipertraps.com/index.php?main_page=product_info&cPath=1&products_id=13Kinda expensive, but I've had mine for years, and it still works well. Never lost a coon.
I put the bait under the trap, under the bait trip pad. Then I put a cinder block on top of the trap after it's set. (That way they can't reach through, and can't move the trap to get the goodies.)
