Aluminum Alloy Anti-skid Bike Pedals For BMX Road MTB Bicycle Size: 4" x 4" x 1" - comes in pair Material: Made of high quality aluminum alloys, good abrasion resistance and corrosion resistant performance. Bearing structure, the degree of lubrication and the strength are greatly improved. Advantage: Antiskid nail surface, strong grasps, no longer skid. Lightweight aluminum alloys all CNC precision process, ensure the assembly precision. Installation: The pedal axis screw distinguish left and right, "R" "L" mark the direction of right and left. We suggest to use 15mm professional open end wrench to install the pedals. Suitable for: BMX, mountain bikes, road bikes, fixed gear bikes, etc.