Function: 1 Double Full Clam Design: Allows you to adjust the double shaft and open the brake shoes on both sides at the same time, avoid the friction of the brake shoes on the wheel rim, avoid the inclination of the brake shoes and make the braking better. Effect 2. Adjustable machine screw: The distance of both sides can be adjusted when installing, very practical. 3 Anodizing: The cover is glossy, good corrosion resistance and rust resistance. 4 Application range: Suitable for front brake and rear brakes, suitable for folding cars and road cars. 5 Manufacture Material:Made of high quality aluminum alloy material, durable and sturdy, definitely extend the life of the product. Specifications: Item Type: Side Pull Brake Caliper Weight: Approx. 192g / 6.8oz Material: Aluminum Alloy Center Distance: Approx. 61-79mm / 2.4-3.1in (distance from screw center to brake shoe or block) Model Number: OPC33,34 Brake Shoe Package List: 1x Folding Bicycle V-Brake