Easy to install: Install by attaching bar to the bottom of a door, pass the buckle through the bottom and close. Product dimensions: 310mm x 215mm x 31mm. Material: Made with steel, cotton and PVC. Sit-up bar: Get a portable abdominal workout device. Home workout: Strengthen your core muscles at home with this lightweight sit up bar! Simply attach to the bottom of your door or bed, ideal for areas with limited space! Comfortable: The bar is padded with foam for maximum comfort while you do sit-ups, crunches and more! Ab Workout Device | Living Social