From producer:

The X3 is a complete home gym system that provides faster, better exercise benefits than conventional weight machines, squat racks, home gyms, etc. through variable resistance training.

• Complete home gym system
• Easy to follow X3 12 Week Program
• Four X3 resistance bands (Up to 30% more resistance than other layered latex bands)
• Heavy-duty alloy steel X3 ground plate protects ankles from high workout forces. Forces that have the potential to exceed 600 pounds