Features: Secure your gear effortlessly with this Metal bike lock featuring quick 3 second installation through 5mm+ holes, eliminating bulky tools while doubling durability compared to standard steel locks. The innovative piercing design with lightweight construction combines Helmets specific security and Multiple purpose diversity for backpacks/skateboards without compromising portability. Designed for urban cyclists, motorcycle commuters, and outdoor enthusiasts requiring reliable theft prevention during extended parking or adventure trips. Perfectly safeguards helmets on city streets, secures equipment at campgrounds, and organizes gear during group outings through its adaptable locking mechanism. Engineered as the last easy carry combination lock, its Small Metal body delivers grade protection across commuting, travel, and recreational scenarios without weight penalties. Specifications: Material: Metal Size: about 5.5x6x150cm/2.16x2.36x59.05inch Package Includes: 1xHelmet Lock note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.