COLORFEY Doorway Pullup Bar Upgrade Safe Lock No Screw Need for Doorframe 28.3″- 37.8″ Price: $19.99 (as of 06/05/2021 12:22 PST- Details)

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2020 NEW INVENTION PATENT – With the revolutionary invention of auto-tightness setting both heads, our genius design no screw pull up bar decomposes the downward force generated by doing pusing up into several much smaller horizontal and vertical forces due to our unique construction, which the heavier make more tighter for the workout bar and doorframe
NO SCREW ASSEMBLY & SAFETY SECURITY – Simply loose the lock and turn the horizontal bar to make sure tightness enough between fitness bar and doorframe, then lock them again, weight test thousands of times, safety using for peoples weight under 440lbs/200kg for shottest length of pullup bar