Our FITBANDS have been designed with two major factors in mind; safety and durability. Each band has one steel carabiner on each end so that it can be attached to a handle, ankle strap, or one of the bench’s anchor points. In addition, the bands can be stacked together to reach up to 70 pounds of resistance. With a nylon casing on each band, these resistance bands are snap-proof. These bands are built to last.