Sturdy and Durable: Heavy duty bike U lock shackles with thickness more then 14mm, Inner material is made of high quality alloy steel, resists cutting by 12tons hydraulic tongs, bolt cutter, it also Anti-smash and Anti-prying. Anti-scratch and Waterproof: Silica gel layer coated protect the d-lock and your bike prevent scratched, and it also waterproof. (Warm tips: For the difficult to clean dirt,Just wipe with alcohol) More Helpful Accessories: 1.Come with a robust and reliable mounting bracket, Which means carrying it around should be a breeze. 2.With a 1.2m/ 4ft flex high-quality steel cable ( notice: cable just Assist the lock, only the U lock is anti-cut, U lock must lock your wheel ) More Safe:Come with 2 pure copper keys,you can leave one of them in your home for spare. C-class lock core and complex serpentine key slot to against various means of theif effectively. Dimension:19.5cm*13cm(L,W), Suggest for bicycle, folding bikes, e-scooter, motocycle, Weight:1.2kg. Colour: Black Product List: 1*Bicycle Lock