Not sure of name, but the sled to sled is priceless. When stuck, Don’t use it as a tow strap!!! We hook a sled up to stuck sled facing same direction you’d pull a ski to level sled for hand pull. Hook up, SLOWLY pull forward to full tension, then lock brake. Now both people can grab a ski and pull and you’ll feel like Superman as the stuck pops to the top. Full trenches in hard snow can take two to three tension and pulls.
Those who choose to hammer the tow sled and let it do all the work end up with two buried sleds.
When buried straight up hill we stomp / clean the pull side down first just like a manual pull out, can turn it with a 90 degree tension angle.
The shallower angle the better, but kids do like to test their parents.
Have been known to drag straight back 10 feet between trees before with a tow rope for extra reach.