the  slide'n'roll  is a sliding and rotating pull-up bar made of high quality stainless steel. The two individual handles can be moved sideways and at the same time allow a rotational movement around their own axis.  They create effective training for climbers and boulderers.
 Particularly noteworthy is the instability, which is effective during forearm training  prepared for climbing or bouldering. But you will also notice significant improvements on the grip board, strength exercises with weights or simple pull-ups after you have trained both your grip strength and your forearms. 
 Slide'n'roll is available in different sizes (1m, 1.5m, 2m)  delivered, depending on the width up to which you want to train with the sliding grips.