YakAttack RotoGrip Phone Holder and Tether OnlyAvailable starting August 12th at 9am EST. The YakAttack RotoGrip Phone Holder is exactly the phone holder you would expect from YakAttack. Its revolutionary design is unlike anything that exists on the market and utilizes our popular RotoGrip technology allowing for quick one handed operation. The phone holder features two adjustable rubber wheels that securely holds most modern day smartphones and the width settings can easily be adjusted.