Material: Bike pedal exts are made of high-quality chrome molybdenum steel, waterproof, anti-rust, anti-corrosive, and offer a long service life. Protect Crank: The pedal ext protects the crank of the chainring and increases the spacing between the pedals. Protective Threads: The crank thread ext includes multiple sets of protective threads to help prevent damage to the crank during pedal replacement. Improved Performance: Increasing the distance between the pedals can help reduce knee discomfort during骑行. Application: Bicycle pedal exts are compatible with 9/16 inch threaded pedals, suitable for mountain bikes, road bikes, folding bikes, and other bicycle types. Item Type: Bike Pedal Ext Material: Chrome Molybdenum Steel Color: Silver Weight: Approx. 54g (1.9oz) Product Length: Approx. 33mm (1.3in) Product Radius: Approx. 18mm (0.7in) Shaft Core Specifications: 9/16 inch (14mm) Extended Pedal Shaft Core Distance: Approx. 20mm (0.8in) Specification: L is Left, R is Right – sold as a pair of left and right shafts (shafts can be stacked) Locking Method: No. 15 Open End Wrench Advantages: 1. Helps protect the crank from damage when replacing pedals. 2. Extends the shaft core to provide leverage and improve ease of use. 3. Helps prevent shoe-to-crank friction, especially for riders with larger feet. Package Includes: 2 x Bike Pedal Ext