Yesser, me and my wannabe a logger jargon, be glad to tell you;
Mostly used by professional loggers; it is a very tall steel tower, they use them to pull massive fir trees up the steepest hills and accross deep canyons here in Oregon. I sight to see.
I am just a mini rancher, so I use a small version of it to drag logs on my place (mostly big leaf maple) onto a deck. I use a tree for the tower. It keeps my equipment off the slopes and out of the brush hellholes.
It is a 100 foot 3/8" cable with a swivel at the choker end. I run the cable through a snatch block/pulley and attach it to a nearby standing tree with a 5/16" chain. I attach it as high as I can on the tree (8 feet).
Sometimes, I pull it straight but usually, I pull the cable at a 30 or 45 degree offset from the logs for the best pulling power. :confused2:
I like it because it lifts the leading edge of the logs just high enough to clear the soil and stumps. When I use my 98 K1500 in 4X4 low range, it pulls 20"X 40 foot logs with very little effort.
The steel hook on the RTV front receiver places the center or gravity (CG) perfectly. It is a wicked looking beefy hook, I got it for 15 bucks (I can PM the catalog company).
I will be setting up the high lead next week, I can take some picks if anyone wants them. It really is a "kick in the behind" to see the logs moving so easily; the RTV just goes back and fourth on the trail. I am a broken down old vet and I need every trick I can find.