New: The parts simply snap together for easy assembly; no tools required. The carpet tread helps keep your pet from slipping and it's removable and machine washable. Designed with rubber grips on the bottom to help keep the step secure as your pal climbs with confidence. Small, portable and easy to store with a weight capacity of 175 lbs. The teardrop-shaped step is designed with an incline so it's easier on your pet’s joints.