Made of high quality, temper hardened steel the Ultimate 420 has a narrow inner width and lock body. The 14mm shackle double bolts into the lock body for robust protection against cutting and torsion attacks. The Ultimate features an innovative soft touch cover that protects your frame and, like all ABUS locks, feature industry-leading corrosion resistance. The red lock body gives it an understated appearance that doesn`t look out of place when fitted to a bike. Supplied with the proven, rattle-free USH universal frame bracket, this lock is full of features at a very sensible price point. It is also insurance approved to Sold Secure Silver level.