2020 LATEST UNIQUE SAFE DESIGN: Heavy-duty steel construction for max stability and durability, the door pull up bar features two high quality steel pole prevents the bar from loosening and spinning when you are doing pulling up. The Pull-up bar holds up to 300 lbs. We have prepared extra fixed iron plates, screws and plastic expansion tubes, if you don't want to put pressure on your doorframe.(picture 7).EASY & QUICK INSTALLATION -NO SCREWS NO HOLES : Ultra Safe Mechanical design. Slip-in design fits standard doorways(24