A. Durable and rust-resistant steel: The bicycle pedal extenders are made of chrome-molybdenum steel and treated with a quenching process, making them strong and durable for long-term use. The precise threads help ensure a tighter connection between the pedals and the cranks. B. 20-millimeter pedal extension to protect knees: It extends 20 millimeters (0.79 inches) from the crank, making cycling more comfortable and helping prevent the keel or legs from scratching against the bicycle. By increasing the length of the pedal axle, it is suitable for the situation where the knee trajectory is outside the pedal, helping prevent knee strain and reducing friction with the rear tire or frame. C. Easy to use and install: It has unique left and right markings, making it easy to distinguish the left and right extenders. Each pair weighs approximately 53 grams. D. Wide application: The bicycle pedal extenders are suitable for most bicycles with standard 9/16-inch threaded pedals, including SPD, MT, BMX, cruisers, dirt jumpers, folding bikes, hybrid/comfort bikes, mountain bikes, downhill bikes, folding bicycles, tricycles, racing bikes, etc. Note: They may not be suitable for 1/2-inch pedals and cranks, and are not recommended for use with carbon fiber cranks. E. Make cycling more comfortable: Installing the bicycle pedal extenders helps adjust the cycling posture, making it more natural. It also performs well during long-distance rides. F. Color: Multiple colors G. Material: Chrome-molybdenum steel H. Package contents: 2 bicycle pedal extenders Only the above package contents are included, and no other products are provided. Note: Due to lighting during shooting and different monitors, the color of the items in the picture may vary slightly from the actual product. A measurement error of ±1 - 3 centimeters is allowed.