Specifications:The product is divided into a pair of left and right shafts (the same shaft can be superimposed)It can protect the crank from damage when replacing the pedal.This product can extend the shaft core to achieve the lever law and save effort.If your foot is relatively large, it will cause friction between the shoe and the crank, which can also be solved.Item Name: Pedal ExtenderMaterial: Chrome Molybdenum SteelShaft Specifications: 9/16" (14mm)Extend the Pedal Axis Distance: 20mmSpecification: L is Left, R is RightLocking Method: No. 15 Open-end WrenchFeatures: Durable, Easy to Install, PracticalSize: 3.3cm x 1.8cm/1.3" x 0.71" (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:2 x Pedal Extenders (Others Not Included)