1) Made of 100% Polyamide, the bike cleats is lightweight and durable. 2) Screws and washers are made of CRMO, having resistance to heat, corrosion and impact. 3) 4.5 degree float system for your riding comfort 4) Anti-slip rubber on the bike cleats, not only prevents sliding when stepping on the floor, but also protects the cleat 5) Package included: bicycle cleat*2; washer*6; screw*6 (Compatible with Look system road bike pedals; NOT compatible with SPD-SL) 6) **Note: This Bike Cleats are Not compatible with ‘Keo’ system and ‘Shimano’ system pedal