DURABLE ANTI-RUST STEEL MATERIALS - bike pedal extenders are made of high-quality chrome-molybdenum steel, which adopts a quenching process to make it sturdy and durable that can be applied for a long time. The precise thread allows a better link between the pedal and the crank.EXTEND THE PEDAL 20MM, PROTECT YOUR KNEE - Extended 20mm/0.79in form the crank gives you comfortable riding, avoid your keel or leg scratch with your bike. Used with knees that track outside the pedal by adding length to the pedal axle, prevents knee strain, and reduces rubbing against the rear tire or frame.EASY TO USE AND INSTALL - Featured by unique L and R markings, easy to distinguish the right and left extenders. Weight: approx. 53g/pair.WIDE APPLICATION - bicycle pedal extenders allow you to attach this set includes most of standard 9/16 in threaded pedals bike, SPD, MT, BMX, cruiser, dirt jumper, folding, hybrid/comfort, mountain, downhill bikes, folding bike, tricycle, Racing bike. NOTE: Not applicable 1/2 inch pedals and cranks, Not recommended for use with carbon cranks.MAKE RIDING MORE COMFORTABLE - Fitting bike pedal extenders can help you adjust your riding stance and will allow cycling a more natural position. They will perform just as well on longer journeys too.Colour:multicolorMaterial:Chrome-molybdenum steelPackage Contents:2 * bicycle pedal extendersOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.