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Looks like a bear trap! Very agressive jaws. I thought about the ice angels but i have a 5" hand auger and they are made for 6" and up.
I have often thought of making a super strong version of this for pulling a stuck vehicle out with a chain or strap and a come along while out on a slippery lake. Like if you break through a slush spot and get stuck with no one else around.
I'm only replying so I can keep track of this thread. Got my first porty this summer....some eskimo anchors (hopefully I can install them lol) but always looking for new ideas! I'm hoping others will share their tie-down methods. Hint hint. Those toothy things look good for a full day on the ice. I'd drill a couple of extra holes to keep from screaming down the lake.
I bought some used "ice climbing screws" on ebay. They screw in with a couple of fingers, come out easily and were inexpensive. They are getting more expensive as they catch on for ice fishing use. They also take up little room.
No kidding. I've been trying to get one specific type over the last six months that had been fairly economical up until the last couple of years. I swear I'm bidding against the same folks when they come up and figure they're ice anglers...and the prices are now approaching those of the screws in favor by the ice climbing crowd. Arggh. We should have kept our traps shut.
I got a few used ones before the word got out and have checked the prices off and on since and they are getting to be nuts even for used ones.
These are the ones I use. For some reason they don't look as tapered in the pics tho. No pre-drilling. But holy cow they are pricey. I think I got 8 of em included with my quickfish!http://www.dickssportinggoods.com/product/index.jsp?productId=2108966
I use something a little different, but are easy to install and remove http://www.ultimateiceanchor.com/