Maximum security Long Shackle U-lock for high theft areas Extra thick 16 mm case-hardened Kryptonium steel shackle resists cutters and leverage attacks Cross bar is shielded by a hardened Kryptonium steel sleeve in a double crossbar design for double security High security anti-pick disc-style cylinder with patented double deadbolt lock Flat key with integrated sliding dustcover protects the cylinder U-lock dimensions: 10.2 cm x 26 cm x 16 mm Approved to Thatcham CAT3