Stronger Material: The door anchor of the resistance band is made of high-quality cloth, not easy to deform and more durable. Cushion Ring and Wide Band: Heavy-duty door anchor is equipped with protective covers to protect the resistance band from routine wear and tear, which is an ideal choice for upper body training. Large and Soft Plug: The soft foam end of the large and soft anchor (plug) can provide strong support and do not scratch or damage paint or wood. Commonality: The 1.5inch diameter and 1.3 inch width stricter allows you to fix the anchor to all positions of the door. door anchor system works perfectly on pull up bands, strength tubes,yoga belt,physical therapy bands,workout bands,etc. Special Fastener: The door anchor contains stainless steel fasteners. Specially designed for resistance bands, they can prevent resistance band from breaking due to wear during exercise