All-Purpose Exercise Bands are extremely strong and durable. They are made of two heavy-duty 4 foot bands that connect to a 10" nylon loop. Because each side of the tubing connects to a center nylon loop, each arm can push and pull independently of the other. Train with a partner or connect the loop to any secure object, such as a door jam or our Hammer Head Anchor Gym. Train in all planes of motion (Sagittal, Frontal, and Transverse). Resistance training is a great addition to any program; build muscle and tone while maintaining flexibility and balance. Handles are made of hard plastic. See chart below for resistance levels per distance stretched. Level 2 Red Level 3 orange