Sportneer Pull Up Bar: Strength Training Chin up Bar without Screws - Adjustable 29.5''-37'' Width Locking Mechanism Pull-up Bar for Doorway - Max Load 440lbs for Home Gym Upper Body Workout, Non-slipBrand: Sportneer Color: Black Features: No Drilling, No Traces: The Sportneer pull up bar uses innovative fixative technology to hold the bar in place without the need for drilling. It is supported by 2 enlarged 6. 5"x1. 8" PVC mats to ensure enough friction for sustained use. The base and bar are connected by 4 metal fixed points that ensure the PVC mat is pressed outward if the bar slips from the base, which provides a fall proof design for the