Complete 3x7 Shifter Set: Includes one left 3 speed grip shifter and one right 7 speed shifter lever, with pre-installed shift cables and handlebar grips. This bicycle shifter set provides precise control for 21 speed mountain bike gears, making it a reliable upgrade for everyday riding Smooth and Accurate Shifting: Designed for responsive gear changes, these bike shifters ensure quick transitions between gears with minimal effort. The twist shifter bike grips and bike shift levers offer a comfortable feel and stable control, giving riders confidence on rough terrain or city streets Durable Construction: Crafted from strong aluminum alloy and reinforced plastic, this mountain bike shifters is built for long-lasting performance. The sturdy design makes it suitable as a mountain bike shifter, mtb shifter, or bicycle gear shifter for commuting, ensuring consistent reliability in all conditions Wide Compatibility: Fits standard 22.2mm handlebars, making this 3x7 shifters kit compatible with mountain bikes, hybrid bikes, cruiser bikes, tricycles, kids’ bikes, commuter bikes, and more. A versatile bicycle shifter levers set that works across different riding styles Easy Installation with Gear Display: This 3x7 twist shifter set comes with clear optical gear indicators, showing the current gear position at a glance. With included cables and grips, installation is quick and simple, making it easy to replace old bike parts shifter and upgrade your bicycle gear shifter system