Review on Adjustable Doorway Pull Up Bar By ONETWOFIT - No Screws Required, Ideal For Home Gym Workouts - Fits Doors 27.5-35.4 Inches Wide With Anti-Slip Mat And Safety Lock - Supports Up To 330 Lbs OT160 by Michael Rasberry

This thing is solid, sturdy. Easy to install, but the instructions didn’t really help. Just know that the red parts on the pull up bar are your locks. You pull them out before you can rotate the bar This rotation extends or reduces the length of the bar depending on the direction. When t is gripping the walls or doorway enough, then you slide the red keys in to lock in place. Of course, double check by pulling and twisting to be sure it is all good to go. Also be careful to keep an eye on your doorway. This devise can damage it pushing against it as it doesn’t seem to stop when you rotate. It will continue till it reaches its maximum length so look out. Test to see if it is solid enough to stay in place and take your weight, then stop rotating and lock in place. Other than that, it works great, super useful for a stay at home time as this.