Features: Crank Thread Protection: The pedal extender Protect the crank thread of the chainring and increase the distance between the pedals. Effort Saving: Extend the shaft core to achieve the lever law and relieve your burden during cycling . Problem Solving: If you wear a relatively large pair of shoes, it will cause friction between the shoe and the crank, which can also be solved. Wearing Problem Worry-free: Add multiple protective threads for rank thread, so you don't have to worry the wearing the crank thread after replacing the pedal. Simple structure, very easy and quick to install and detach. With Unique Marking: Right and left extenders are easily identifiable with unique L and R markings. Package Includes: 1 Set Bicycle Pedal Extension Specifications: Material: TC4 Titanium Alloy Color: Black/Colorful/Gold Weight: 27.4g-31.6g(L/R) Size Optional: L and R: 16/20mm Two Combinations: 32mm/16mmx2 Packing: Hard Metal Box note: 1.Please allow 0-3mm errors due to manual measurement. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.