[Fitting handlebar: Fits most cylindrical handlebars from 0.87" (22.2mm) to 1" (25.4mm) in diameter. Function: Allows you to drink your favorite beverage on the ride. Bike handlebar mug holders. Ideal for carrying 12-16-20oz handlebarless cups such as your morning coffee sports water cup tea or hot chocolate mug. Appearance: Retro design made of aluminum and leather. The brown leather is very vintage with a harmonious color scheme. Package content: Handlebar Cup Holder X1 M5 wrench X1.Some bike handles are irregular so be aware that if you tighten the cup holder and it still slides wrap a couple of rolls of electrical tape or non-slip tabs. The cup holder holds your drink firmly on the handlebars so your hands are free to ride and this bike drink holder can bring a lot of convenience to your ride.]