- Robust Safety Design : The Rockbros helmet lock features a durable 8-inch locking body, designed for high strength to resist cutting attacks. The full enclosure also protects against scratches with its PVC coating. - High Scalability : This versatile lock chain extends up to 60 inches, providing flexibility for securing a range of items. The reinforced steel cable ensures effective resistance against cutting, delivering top-notch theft prevention. - Ideal for Daily Use : Perfect for locking helmets, bicycle wheels, cars, suitcases, doors, stairs, and more. This compact lock is designed for protecting your belongings wherever you go. - User-Friendly Operation : Equipped with a 4-digit customizable code, adjusting the lock's combination is straightforward. Simply turn the lock collar as per the user guide. Quick to attach and detach, it makes securing your items hassle-free. (Tip: Take a photo of your code for easy reference.) - Lightweight and Portable : Weighing only 100g (0.2 lb), this cable lock is extremely light, making it easy to carry. You can attach it to your bike’s handlebar, stash it in your bike bag, or keep it in your pocket for convenience. With its reliable design, convenience, and effectiveness, the Rockbros helmet lock is an essential tool for anyone looking to enhance their security on the go.