HIGH QUALITY:Made of Alloy steel and nylon materials, with high hardness, high strength, wear resistance and high toughness ALLOY STEEL SCREW:All screws are made of Alloy steel material, high strength, beautiful appearance, no rust and damage DESIGN:Cleats is a clever design feature that allows a slight lateral rotation of your feet while remaining securely clipped into the pedals. This feature provides a balance between stability and freedom of movement, reducing strain on your knees and enhancing overall comfort ADVANTAGE:Durable material nylon can increase friction, effective anti - slip. When walking on hard floors they are pretty quiet and comfotable PECULIARITY:Self - aligning mode, easy to install, easy in and out, fully leveraging for athletic competition, fit for most road cycling shoes with three holes