With its 14 mm thick round shackle made of specially hardened steel and eye-catching colour in a modern design, the Ultimate 420K makes it immediately clear that your bike is secure. The U-lock offers a high level of security with its solid construction and high-quality lock cylinder. Thanks to the USH holder supplied, the bike lock can be transported conveniently and without annoying rattling. The lock body casing in the proven signal colour has been given a modern design. Thanks to the ribbed structure of the black offset lock body side, the Ultimate 420K sits comfortably and securely in the hand.