This bicycle adjuster bolt is made of aluminum alloy, CNC numerical control forming, lightweight, reusable and durable, Great internal thread and high elastic stainless spring, smooth adjustment, surface of anodized, colorful colors for you to choose This bicycle adjuster bolt is lightweight, reusable and durable.--HIGH QUALITY: This bicycle adjuster bolt is made of aluminum alloy, CNC numerical control forming, finely crafted.--COLORFUL: The surface of the product is anodized, colorful colors for you to choose from.--UNIQUE DESIGN: This product uses a unique internal thread design, smooth adjustment.--CYCLING PARTNER: The product's high elastic stainless spring is good for color: black, [...]