Bicycle U Locks With Keys, Heavy Duty Bike U Lock With 5 Ft. Of Security Steel STURDY DURABLE: Don?t risk your bike getting stolen! You?re in good hands with the Sportneer Bike U Lock which is cut-resistant, leverage-resistant and drill-resistant, made with 0.56in, high quality alloy steel. Covered in a 0.10in silicone cover, the lock will stay protected from wear and tear, while also protecting your bike from scratches. ADDITIONAL 5 FT CABLE: Also included is a 5ft double-looped steel cable 0.43in thick (including PVC covering). You can use the cable to lock the frame, your helmet, the wheels, or other bikes. Secure your bike to bike racks, fences, poles and more! PORTABLE U LOCK: This U-lock is heavy enough to keep your bike safe but light enough to carry around with ease. It measures 7.68in*4.9in and can be affixed to your bike with the mounting bracket, great for all circular tripods with a diameter of less than 30mm. Toss it in your backpack or attach it to your frame for easy access! ADDED SECURITY: Get the same security as a car door or anti-theft door with this zinc alloy lock cylinder! The 2 included keys are rust resistant with advanced serpentine slots for added safety and security. HELPFUL TIPS: This Bicycle U Lock can withstand up to 12 tons of hydraulic shear, protecting the bicycle from theft. Please note that no lock is 100% safe. Never leave your bike in high-crime areas or leave your bike unattended outdoors for long periods of time.