Witht this you can add to your current pull up bar to make more of an effort and have more fun. This is an (add on not an entire pull up bar).
Elliptical Machine Bolts Adjustment Release Pull up Spring Knobs
Pull up Spring Knob Pin for Exercise Bike Weight Benches Platform Stand
ONETWOFIT Power Tower Pull Up Bar Station&Assistance Machine,Multi-Function Adju
Upgrade Elastic Sit Up Pull Rope Spring Tension Foot Pedal Waist Arm Abdomen ...
