Now shop with both hands!! The CartClamp by GripTough is a simple and innovative product that helps you shop faster. It securely clamps around the handle of any shopping cart and keeps your arm free to shop. The CartClamp by GripTough is a secure, easy-to-use phone holder that features a hand-fabricated, custom-designed welded steel clamp. The included phone adapter securely grips your phone without springs using a thumb screw. The adapter attaches to a swivel ball joint that allows you to adjust the viewing angle of the phone. The CartClamp is designed to last a lifetime. Lifetime exchange warranty on this item on all metal parts.