There is no other tools needed when installing, you just need install this bike spoke light on the bike wheel directly, which is easy and convenient, and with the switch design, you can turn it off during the day, which is good for energy saving.Owning the stylish streamline shape, colored and high brightness, this spoke light is capable of allowing your bike to be more attractive and cool, and since one wheel can be matched with more than one spoke light, you can choose the matched spoke light group to decorate your bike wheels.ABS is the main material used to make this bike spoke light, which is anti-corrosion and waterproof.12.5cm is the length of this spoke light and 3.8cm is the width of it.This spoke light can be used with mountain bikes, road bikes, motorcycles, etc.Item Name: Bike Spoke LightMaterial: ABSCircuit: Switch DesignBattery: 1 x 3V CR2032 (Included)Features: Waterproof, Eco-friendly, Impact-resistantModes: Sustained Flashing, Intermittently Flashing, Fast FlashingApplicable Bikes: Mountain bike, Battery Bike, Road Bike, Folding Bike, MotorcycleSize Details: 12.5cm x 3.8cm/4.92" x 1.5" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Spoke Light (Battery Included)