Lifting an AC unit with a drill-powered pulley system - GIF

Lifting an AC unit with a drill-powered pulley system.

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Previously:

Hot forming a pulley - GIF
Pulley machining lathe attachment - GIF
Setting up a block and tackle pulley - GIF
Two-step pulley - video
Uprooting a tree using a 45:1 pulley system - video

I want that. I can't seem to find it for sale on any of the usual scumbags though. Hmmm... Is it a converted safety device or something?

he is sure trusting contact friction of that strap around the tree. Without a full wrap around the tree once that strap reaches the critical angle it is going to slip up the bark and whatever they are lifting is going to come down.