Multifunction: Multi-functional fitness aids to help you roll your movement push-ups, legs, sculpting, abdominal support, stretching Material: portable sit-up, thickened soft foam handle, non-slip, durable wear-resistant,High quality steel bracket and rubber vtouse, hard and stable, long service life. Easy installation：Three heights can meet your different needs, press the spring buckle up inside to adjust the height of the crossbar, press the black button up or down to release / fix the vest. Strong suction: fitness vest has strong suction, not loose, the strong jacket can be firmly fixed to the ground. after wiping the floor with a damp cloth, the suction power can be further enhanced. Field of application: Sit-up assistant device suitable for smooth surfaces such as tiles, concrete-cured, marble, wooden floors, ensure that the ground and are clean. Number of pieces delivered: 1 Color: Black Size: please see the picture Note: the data is manual measurement, please allow some error from 1-115cm, due to differences between light and screen, there will be a certain color difference, the specific received in kind prevail.