Durable and Strong: The mountain bike pedals are made of durable nylon composite pedal body and high strength Cr-Mo spindle which has shock-proof, abrasion and corrosion resistance Anti-skid & Great Grips: The flat mountain bike pedals designed with 9 replaceable steel Pins per side provide great grip and a safe ride on rainy days and bumpy roads. Even if the nylon pedals are covered with a thick layer of mud after a muddy ride, never worry your feet slipping off the pedals