The gr an it 460 is a solid and popular lock that is great for on-campus use and medium level security needs. This lock is a favorite because of how well it performs and for its durability. The gr an it 460 features a 12mm parabolic shackle for extra protection against pulling attacks and like higher security Abus locks the shackle double bolts in the lock body for protection against twisting and torsion. The shackle, lock body and supporting elements are all made of special Temper hardened steel and offer an excellent security to weight ratio. All Abus locks offer industry leading corrosion resistance.