The Granit X-Plus 540 is the flagship bicycle U-Lock from ABUS. Ideal for urban settings and high quality bicycles needing strong theft protection, the 540 features a patented 13mm temper hardened steel square parabolic shackle and a double bolting shackle/lock body. Patented ABUS Power Cell technology offers the highest protection against hitting and pulling attacks while the X-Plus Key cylinder offers extremely high protection from picking. The 540 can be keyed alike with other ABUS locks featuring the same X-Plus cylinder – very convenient for multi-lock and multi-bike households. All ABUS locks offer industry leading corrosion resistance. 13mm patented square parabolic shackle Double bolting shackle/lock body The shackle, case and supporting elements of the lock mechanism are all made of special temper hardened steel ABUS X-Plus Cylinder offers the highest protection against picking Two keys supplied with lock, one with LED light Automatic keyhole cover protects against dirt and corrosion ABUS Code Card makes ordering additional or replacement keys easy.