Upgraded Door Anchor for Resistance Bands: Exercise movements , change exercise patterns, work different muscle groups such as shoulders, arms, legs, glutes, resistance band training, back, great for arm and shoulder physiotherapy. Sturdy and :Made of top quality such as material car seat belt, can withstand 500 pounds of high strength, we strengthen the connection between the anchor strap and the door to improve wear resistance and stability. Exquisite stitching process, so you can be more secure in the process of movement. Portable and Easy to Install:Wherever there is a door, there is your personal gym. The door anchor straps do not require any installation tools, you just need to wrap the door anchor straps around the door and secure the fastening buckle to the back of the door without damaging your door. Bring a storage bag for your workout or while traveling. Colour:Black Material:Nylon + zinc alloy Size:5.1x2x0.5cm Package Contents: 1 x Door buckle Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.