Power Systems Anchor Assist Strap for Resistance Band or Tube Exercises, Black (84790) Stap anchors your resistance band or tube to a fixed point Perfect for rehabilitation facilities or home use Lightweight, durable nylon Extends the range of exercises you can do with a tube Resistance exercise training aid for speed, agility, strength, power, running, football, basketball, baseball, soccer and all other athletic, fitness, weight, or cross training Anchor band or tubing to doorknob, doorjam, or fixed object Uniquely designed attachment strap Color: Black