Double-bar system makes mounting and dismounting easy Quick-disconnect locking brackets secure the rack to the doorframe and allow for easy removal; easily installed with screws High-quality finish has a scratch-resistant powder coating for years of use Door savers protect the doorframe from damage while in-use Foam hand grips offer a comfortable and secure workout Dual self-locking ratchet buckles offer a unique double-lock system for added security Super soft 5/8-inch foam liners provide maximum comfort with minimal compression Made of lightweight, highly durable DuPont Hytrel material for a comfortable fit Removabel calf loops place a two-degree bend in the knees to help reduce the load on knee joints and the top of the foot Hooks and calf loops are made of 40 percent glass nylon alloy for strength