Overview: Useful for bikes which have no holder or inadequate for a frame holder. Convenient to fetch drink from a bottle holder. Simple & practical design. Sturdy structure, prevent deformation damage. Strongly-gripped hinge, fix the holder tightly. Suitable for varied types of bikes, including mountain bike & folding bike. Specification: Weight Approx:55g Size Approx:7 x 7.6 x 15.2