1Material: Bike pedal extenders are made of high quality chrome molybdenum steel, waterproof, anti rust, anti corrosive and has a long service life. 2Protect Crank: The pedal extender protects the crank of the chainring and increases the spacing between the pedals. 3Protective Threads: Protective crank thread extender adds multiple sets of protective threads to the crank thread, to protect the crank from damage when replacing the pedals. 4Improved Performance: Increasing the distance between the pedals will greatly improve the uncomfortable influence of the pedals on the knee. 5Application: Bicycle pedal extenders allow you to attach this set to 9/16 inch threaded pedals bike, such as mountain bikes, road bikes, folding bikes, etc. Item Type: Bike Pedal Extender Material: Chrome Molybdenum Steel Color: Silver Weight: Approx. 54g/1.9oz Product Length: Approx. 33mm/1.3in Product Radius: Approx. 18mm/0.7in Application: Bicycles such as Mountain Bikes, Road Bikes, Folding Bikes, etc.Shaft Core Specifications: 9/16 inch (14mm) Extended Pedal Shaft Core Distance: Approx. 20mm/0.8in Specification: L Is Left, R Is Right The product is divided into a pair of left and right shafts (the same shaft can be superimposed)Locking Method: No. 15 Open End Wrench Advantages: 1. Protect the crank from damage when replacing the pedals. 2. Extend the shaft core to achieve leverlaw and save effort. 3. If your feet are relatively large, it will cause friction between the shoes and the crank, which can also be solved 2 xBike Pedal Extender