Growing up I had a love hate relationship with cable come alongs, (they were usually beat up pretty bad) They were great when I managed to figure them out and a pain when I struggled, pinched fingers and got stuck with frayed cable. Fast forward to my adult years this is by far one of my favorite tools. They are a simple tool once you understand them and are in decent shape, and can make a huge difference depending what you are doing. These days I prefer chain come alongs but none the less the idea is the same. Here’s a good explanation the mechanics. Enjoy!