Strauss Cycle Mobile Phone Holder with Mount Bracket, (Black) and Bicycle Bottle Holder (Black) Double clamps with silicone mats to hold your phones or other devices and protect your devices. An adjustable clamp design on the pedestal, convenient installation onto different bikes. (supports those handlebars, the diameters of which are between 15mm and 30mm.) Upgraded grip - this bottle cage is upgraded clamp with a rubber pad Expanded size - this quick release bottle cage fits for most standard-sized water bottles. 2.5 inch - 3.3 inch bottle in diameter No tool needed - the clamp of the bottle cage is designed for easy to installation and remove, no tool needed