Gym1 Power Fitness Package (Pull Up Bar, Pullup Extender, and Ab Straps) Includes Gorilla Gym core unit, Ab Straps, Pull-up Extender Perfect for upper body and core workouts. Gorilla Gym is the premium pullup bar which is designed to strong and safe enough to support a swinging motorcycle and rider More stable and sturdy pull-up bar, more hand positions, wider range of motion, spaced away from doorway, ab straps for core workout No drilling, no holes, no bolts: Gorilla Gym installs in seconds and will not fall off. Fits most standard doorways 24"-36" wide with regular trim. See our infographic to make sure your doorway will work. This basic set is stronger and safer than another other pullup bar on the market today thanks to our patented vise grips and stabilizers that grip your walls and allow for full body motion