This is a winch that allows rope ascent and descent using an electric drill. Ropes from 9 to 11mm can be used. I bought it because I thought it would be convenient for landscaping, but I'm not familiar with rope work and haven't had the opportunity to use it, so I'm selling it. It has been used about 5 to 10 times. There are some minor scratches. Please consider this only if you are familiar with this type of equipment.