It takes a little playing around with it to figure out the best settings, but once it's dialed in, it works great

Bottom line, unless you're already really strong and need more than 154lbs of resistance, this should be all anyone needs for a very long time

B) The shiny silver disc is for Micro adjustments

Great quality and customization

Half a turn will increase the resistance by about 6lbs, quarter turn 3lbs, ect

Let's say that for every full clockwise turn of the plastic black knob, the strength is increased by 20lbs and the silver knob can be rotated to from end to end to increase up to 10lbs