HEAVY DUTY DOOR ANCHOR HIGH QUALITY DESIGN: - Door anchor is made of heavy duty thick nylon fabric to withstand 300 lbs of tension. - Door anchor stopper is very large and soft, designed to protect doors from scratching and dents. - The door carabiner is well made to help keep your resistance bands from damage. Versatile: - Works on all door points - The door hook of fitness products uses dense but soft foam. -3.3cm in diameter. -1.5" thick - It can secure the laces at all points, even if there is a lot of space at the bottom of the door. - This feature greatly increases the number of exercises you can do Protection: - The soft foam end of the anchor (stopper) helps prevent door scratching and denting. - These bands become important when you stretch the bands create great strength between the anchor and the door. - The front side of the nylon strap anchor (loop) is very soft. - This bracelet will help to maintain your straps by creating a smooth surface to squeeze them when they are stretched.