Description Enhanced Security: Features a high-quality zinc alloy cylinder with a B-level anti-theft rating, resistant to leverage attacks and technical opening.Sturdy and Durable: Made of high tenacity A3 alloy steel with a PVC coating, 21MM diameter for resistance against hydraulic shears, sawing, and drilling.Extra Long: 1000MM in length, suitable for locking to various objects.Waterproof and Heat Resistant: Zinc alloy lock cylinder is waterproof and heatproof, nickel-plated for rain and corrosion resistance, with a dust cover for the keyhole.Portable: Heavy enough for security but light enough for easy transport. Intuitive locking mechanism for ease of use.Amazing Security: Can withstand up to 18 tons of hydraulic shear force. Note: No lock is 100% secure; avoid leaving bikes in high-crime areas or unattended for long periods. Features Material: Alloy Steel, Zinc, Polyvinyl ChlorideWeight: 1.63 PoundsPackage Dimensions: 9.37 x 7.01 x 2.68 inches