The pull rope attachment has six levels of magnetic resistance that provide 30 lbs of traction. This is an excellent exercise for upper body and will work every muscle to give an excellent workout.Fully portable can be anchored in crossbars of functional trainers , squat racks, 3D Smith machines or if used outdoors, it can be anchored to a tree.Comes with Kevlar belt and two carabiners that secure the unit to the anchor point.