Securit Locks made by Abus. Patented pick and break resistant 6-wafer key and key cylinder. Shackle body and supporting elements made from temper hardened steel for cut and torsion resistance. Pass-through shackle provides anti-twist protection in a simple innovative design. SH 34 Bracket mounts easily to frames with 24-35mm diameter. Double layered special wafers with decoy cuttings for added security. Two keys are supplied with the lock