Centra Folding Ab Machine Roller Wheel Workout MatDescription This versatile 2 in 1 ab trainer combines both an ab roller and a crunch machine, ideal for fitness enthusiasts looking to burn fat and improve overall health. The easy to use side knobs allow you to switch between the two functions: use the ab roller as handlebars in crunch mode or detach it for independent use as an ab roller. The ab machine features a TPR non slip mat for added safety and an ergonomic figure eight kneeling pad for