Pull-ups are touted as the best all-around upper body exercise on the planet. The Rubberbanditz multi-functional training bar is versatile and easy to install, so you can strengthen and tone your arms, back, chest and core with one piece of equipment. The bar has three grip positions (narrow/wide/neutral) to work your muscles from many different angles. Fits standard residential doorways (32 to 36 inches wide) and supports up to 315 lbs Installs in seconds and uses leverage to hold against the door – no screws or damage to door. Consider adding a Rubberbanditz pull up assistance band for extra help getting over the bar.