Specially hardened steel, power cell technology for protection against impact and attempts to force open the lock, XPlus cylinder for the greatest protection against tampering: The GRANIT XPlusTM 540 U-Lock combines the highest-quality materials with the latest technology for protection against theft! It is a first-class lock which protects your bicycle when the risk of theft is high. Various quality seals demonstrate the value of the GRANIT XPlusTM 540 U-Lock: It is VdS approved and has received seals of approval from institutes in Russia, the Netherlands, Finland, Sweden, Denmark, Norway and the United Kingdom.