●★DURABLE & STABILITY: It is made of excellent quality steel that is sturdy, stable and durable. ●★ EASY INSTALLATION: Simple structure, very easy and quick to install and remove, save time ●★SAFE TO USE: Prevents stress on your knees and chafing on the rear tires and frames for safe use. ●★ EASY TO USE: Left and right extenders can be easily identified with their unique L and R marks. ●★ OPTIMAL USES: Use this product with 9/16" threaded pedals to extend the pedal position to 17mm outward.