About this item: Sturdy and attaches easily to the door. It doesn't move while doing the workout. Fit for the door thick size to 2INCH max. Easy to change bands of the help of the carabiner. Once attached to the door, you can leave them there. Which is using the cloth and rubber anchors that come with bands. Take notice of this, install on the correct side of the door and make sure the door can be closed (Usually installed in the direction of closing the door). The metal parts in contact with both sides of the door is wrapped with soft plastic, no damage to your door. Process: sand blasting Material: Metal colour: Black Package Contents: 1 x heavy duty door anchor 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.