1. two use:One side is used for professional lock pedal,other side is used for comfortable flat tread. 2. Sealed bearings make pedals work more efficient,wear and impact resistance. 3. Ultralight and portable. 4. Column nail cleat,Not easy to . 5. new and high quality.High Wear-resistant and excellent durability Pedal Device Category: 3 Bearings Weight: 384g/pair (192g/pc) Colour: Black Material: Aluminum alloy + chromium molybdenum steel Size: 106 x 92mm Package Contents: 1 pair x bicycle pedals 1 set x accessories Only the above package content, other products are not included. Note: Light 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.