1PC Vacuum Suction Cup Sit-Up Foot Fixation Assistant, Adjustable Foam Pad Abdominal Training Support Bar, Portable Home Core Training Equipment, Stable Thickened ABS Plastic Support Frame, High-Frequency Abdominal Training Process Structure Stable Without Shaking; Large Area Suction Cup Forms Reliable Vacuum Grip On Smooth Hard Surfaces; Soft High-Elastic Foam Roller Reduces Ankle Pressure And Avoids Abrasion; Multi-Angle Rotatable Design Meets Various Abdominal Training Movement Needs;