The COREFX Door Anchor is an essential accessory that will turn resistance bands and tubing into a functioning anchored tool. Compatible with the COREFX Advanced Toner, Power Tube, Strength Bands, and Flat Bands, it allows you to train from various anchor heights in the comfort of your own home. Simply slide your Door Anchor through the hinge side of your door (for added safety) and thread your tube through the loop end to perform all the most popular gym workouts.