1) The frame is made of magnalium and the axle is made of CRMO, lightweight, anti-corrosion and durable. The spring on the bicycle pedals is tightly fixed and fastened. 2) 120 mm² pedalling area on the bike pedals greatly improve the conversion efficiency of pedalling 3) 4.5 degree float system for your riding comfort. Easy installation: L for left pedal; R for right pedal. 4) Anti-slip rubber on the bike cleats, not only prevents sliding when stepping on the floor, but also protects the cleats 5) Package included: bike pedal*2; bicycle cleat*2; washer*6; screw*6; allen wrench*1 (Compatible with Look system road bike pedals; NOT compatible with SPD-SL)