Max Capacity Exceed 440LBS1.7mm extra thick heavy-duty steel, rather than 1mm thin steel, increase stability and durability, Max weight capacity of the pullup bar exceed 440LBS. The chin up bar uses high quality T-bolt and jam nut which ensure that automatic locking position, screws never loosen, providing extra security. With baking paint process, beautiful appearance, Anti-peeling paint, Anti-rust, durable and long-lasting. Measure Your Door FrameThe length of the doorway pull up bar is 37’’, which fits any standard doorways width from 24’’ to 32’’, deep from 4.7" to 7.5". Portable design, No screws, NO holes on the wall and NO damage to door. Simple installation, Assembly in seconds. You can remove the workout bar after exercising, making it an ideal fitness equipment for home or indoor. Multifunctional Home GymAOPA Pull Up Bars is an ideal upper body exercise equipment with three grip positions, narrow, wide, and neutral. The door pull up bar supports push- ups, sit-ups, pull-ups, chin-ups, dips, arm and shoulder exercises. It's easy to make your home and office become your gym and help you build a strong upper body & core muscles. Ergonomic Design1. We offer a pair of additional foam to protect doorway without marks. 2. The square steel on the chin up bar top has a thickened foam stripe (others only has thin stripe) provide extra protection for the wall. 3. Multiple handles are coated with professional-grade high fiber foam, comfortable grip, multi-function, anti-slip and wear resistance to protect your wrists and relieve fatigue during exercising.