SPD pedal locking system can adjust the tension of insertion and withdrawal, making it easier to lock and unlock the pedals; ultra-light weight, high riding efficiency, better distribution of legs when riding long distances or high speed riding the power of.The main material of the pedal is made of high quality material, and shaped, anodized and colored, corrosion-resistant and wear-resistant, and does not fade.The tightness of the pedal can be adjusted with an Hex key. "+": Tighten, "-": Tune looseBrand: Axis: 14mmSystem: SPDPedal Category: Self-locking PedalPedal Device Category: PedalUse: Mountain BikesModel Number: M540style 1: mountain Bike safe Clips Pedals Self Locking pedalsstyle 2: bike pedals with self -lockingstyle 3: Aluminum alloy self-locking pedalsstyle 4: Sealing bearing lock pedalsstyle 5: Mountain bike lock pedalcolor:BlackMaterial:Nylon + chrome molybdenum steelPackage Contents:1Pair x Bike PedalsOnly the above package content, other products are not included.Note: Light reflection 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.