Chin Up Bar Pull Up Bar Doorway Home Gym Exercise Strength Fitness. Color: black and red. Easy Installation: Screw Fasten Cups to Door Frame, twise bar to extend to snug fit. High Quality: Great chromium-plated tubular steel, super strong, come with non-slip eva grips with a max weight capacity of 250 LBS. <br>Multi-function: Exercise muscles with push-ups, pull-ups and crunches. For greater peace of mind, come with end caps for more permanent installation, in additional to twist and lock mechanism.If you do not use the cups and screws to install, your bar will be pushing into the wood and create indentations on your door frame. For your convenience here is a link to assembly video: https://youtu.be/i0lN0ssdn1w. You can also search "18490 PULL UP BAR INSTRUCTIONS" on youtube to locate the video. You can also download video by following this link: fixturedisplays. Com/video/18490.AVI