Fitness Pull Up Bar for Doorway with NO SCREWS, Strength Training Pullup

Features:-It adopts five major locking technologies, with triangular mechanical bases, high-strength double springs, built-in multi-gear anti-reverse locks, external reinforced mortise and tenon locks, and octagonal "spider web" widened silicone contact surfaces.-It uses the principle of triangular lever mechanics. The heavier the force, the more the spring compresses the tops of the two ends of the base, making it more firmly attached to the wall.-After the mortise and tenon locks are inserted, the one-way gear lock can function, that is, the horizontal bar can only be tightened but not loosened, and will not become loose under force.Notes:1. Mortise and tenon lock open: only rotate the horizontal bar forward to adjust the horizontal bar distance.

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