Protect the crank from damage when replacing the pedals, and extend the shaft core to achieve mechanical advantage and save effort. If your feet are relatively wide, it will cause friction between the shoe and the crank, which can also be solved. Protect the crank thread of the chainring, and replace the pedal multiple times without worrying about the wear of the crank thread. Increase pedal spacing. The axle core extender is widened by 16mm/0.63in on one side, which greatly improves the comfort of riding a bicycle with a wide body and wide hips. Reinforcement structure design with concave-convex platform installation position. The structure is strengthened, and safety is guaranteed. An 18mm/0.71in wrench or adjustable wrench is required for disassembly and assembly. Splicing uses a unilateral distance to lengthen the same side of the axial tooth; the distance can be increased to 32mm/1.26in after stacking. Product Name: Bicycle Pedal Extender Color: Black Material: Aluminum Alloy Size: 16mm Package Contents: 1 Pair x Bike Pedal Axle Extenders Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the real thing. The measurement allowed error is +/- 1-3cm.