The road lock can help the rider to increase the cadence speed. If the cadence speed is above, the shoe and the pedal will be separated when the cadence is not used. Therefore, using the lock can increase your cadence. The lock shoe is fixed on the lock pedal to correct the riding posture, and there is no need to worry about the physical strain caused by the wrong posture.Advantages: Improve riding stability. Fixed foot and pedal position. The biggest use of the shoe is to fix the position of the foot on the pedal to correct the position of the old position due to poor posture. Second, make sure your foot is on the pedal.Both Used for Shimano and Looking at the same time ,you don't need changed the adapter. You can use the adapter to match any of your other bike cleats to free your footAdapters Pedals are the simple, lightweight, and affordable adapter to convert your road or mountain bike for casual riding. Don't buy a second or third bike for the casual ride around the neighborhood. With one set of the best clipless pedal to platform pedal adapters on the market, you can ride around in comfort Size: 75 x 65mmModel Number: FOR SHIMANO LOOKERUse: Mountain BikesPedal Category: Self-locking Pedalcolour:BlackMaterial:Aluminum alloyPackage Contents:1 pair x mountain bike cleats1 set x installation kitOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.