Multi-Function: Multi-Functional Fitness Aids For Helping You Roll Movement Tummy Push-Ups, Legs, Body Sculptingabdominals, Ab Support, Stretching. Material: Portable Sit-Up, Thickened Soft Foam Handle, Non-Slip, Durable Wear-Resistant,High Quality Steel Bracket And Rubber Suction Cup, Hard And Stable, Long Service Life. Easy Installation:Three Heights Can Meet Your Different Needs, Press The Spring Buckle Inward To Adjust The Height Of The Crossbar, Press The Black Button Up Or Down To Release/Fix The Suction Cup. Strong Suction Cup: Fitness Suction Cup Has Strong Suction, Not Loose, The Strong Suction Cup Can Be Firmly Fixed To The Ground. After Wiping The Floor With A Damp Cloth, The Suction Power Can Be Further Strengthened. Scope Of Application: Sit-Up Assistant Device Suitable For Smooth Surfaces Like Tiles, Concrete-Cured, Marble, Wooden Floors Wood, Make Sure The Floor And Suction Cups Are Clean.